Alright, I have a few questions in regards to my method of learning. I would like some input/advice! Please go easy on me. 
Some background:
I completed RTK a few years ago and I still remember most of them, and the ones I don't remember come back to me as soon as I look them up again. When I was studying, I was reading Tae Kim's grammar guide (not religiously, only when I came upon a grammar point I did not understand), + studying the core decks and I got about halfway through before life happened and I had to move. My motivation to study plummeted.
Fast forward to now, I'm trying to get back into the rhythm of things because Japanese is a thing that has always been in the back of my mind and won't go away... like, "study meeeee" etc etc. I have absolutely no clue what my level is, probably upper level beginner. I can read a few hundred words, my listening is not too bad if the speaker isn't talking ridiculously fast. Damn I am being vague as hell, I'm sorry.
ANYWAY. My method as of right now is trying to go strictly J-J in my anki decks, using example sentences with a particular word or grammar point I'd like to learn. Now, being away for a while I don't know which site is reliable and which would be detrimental to my learning... I don't want to pick up bad habits. Right now I'm using Tatoeba for my sentences, and using weblio/sanseido/goo for my definition needs.
On the front side of the card is the sentence, and if I can read every word and understand the whole sentence, I count it as good. On the back side I'll have the definition of the word I'm trying to learn. This is where my issue begins! Quite often the word is a lot easier to understand than the definition. I'll have to look up the definition of the word in the definition, and sometimes it's an endless cycle of looking up... and I have no clue if learning these words is even worth the headache.
In addition to that, I'm listening to as much as I can; mostly mucking around on niconico and watching streamers, dramas, movies, youtube, podcasts, also looking up Japanese subs, as I don't use English subtitles anymore (I'm not really that big into anime, but I do every so often). I write down every sentence as part of my review process, not just because I feel it helps me remember, but I enjoy the process of writing. I also try to read them aloud, to try and get used to speaking.
Now, my questions are: Am I trying to make things too difficult on myself by doing it this way?
Is Tatoeba a reliable source for Japanese sentences? I've read mixed reviews, but it seems the most negative are from back in 2010.
If you are J-J only, how do you learn new words?
Any advice is appreciative.

Some background:
I completed RTK a few years ago and I still remember most of them, and the ones I don't remember come back to me as soon as I look them up again. When I was studying, I was reading Tae Kim's grammar guide (not religiously, only when I came upon a grammar point I did not understand), + studying the core decks and I got about halfway through before life happened and I had to move. My motivation to study plummeted.
Fast forward to now, I'm trying to get back into the rhythm of things because Japanese is a thing that has always been in the back of my mind and won't go away... like, "study meeeee" etc etc. I have absolutely no clue what my level is, probably upper level beginner. I can read a few hundred words, my listening is not too bad if the speaker isn't talking ridiculously fast. Damn I am being vague as hell, I'm sorry.
ANYWAY. My method as of right now is trying to go strictly J-J in my anki decks, using example sentences with a particular word or grammar point I'd like to learn. Now, being away for a while I don't know which site is reliable and which would be detrimental to my learning... I don't want to pick up bad habits. Right now I'm using Tatoeba for my sentences, and using weblio/sanseido/goo for my definition needs.
On the front side of the card is the sentence, and if I can read every word and understand the whole sentence, I count it as good. On the back side I'll have the definition of the word I'm trying to learn. This is where my issue begins! Quite often the word is a lot easier to understand than the definition. I'll have to look up the definition of the word in the definition, and sometimes it's an endless cycle of looking up... and I have no clue if learning these words is even worth the headache.
In addition to that, I'm listening to as much as I can; mostly mucking around on niconico and watching streamers, dramas, movies, youtube, podcasts, also looking up Japanese subs, as I don't use English subtitles anymore (I'm not really that big into anime, but I do every so often). I write down every sentence as part of my review process, not just because I feel it helps me remember, but I enjoy the process of writing. I also try to read them aloud, to try and get used to speaking.
Now, my questions are: Am I trying to make things too difficult on myself by doing it this way?
Is Tatoeba a reliable source for Japanese sentences? I've read mixed reviews, but it seems the most negative are from back in 2010.
If you are J-J only, how do you learn new words?
Any advice is appreciative.

Thanks for warning me about tatoeba; I wasn't sure about it before and now I don't think I'll risk it.