Hi, today I have just downloaded the core 2000 deck. I went up to 1700 in RTK and went through the essential parts of tae kim's grammer guild, and should be able to pick out the meaning of most "not too long" sentences. I still don't know what to attach to most U-verbs after the kanji though, but I hope to be able to pick them out and learn them as I'm going through core 2k.

I see the part for playing audio clickable and highlighted, but I just cant seem to get any sound of it.

Any solutions for it?

PS: I am a anki newbie here, as I entirely used this site for rtk.

As I remember, in the deck description (on Anki when you download), NukeMarine explains how to download separately and install the audio (I don't have the deck, so I can't help you more :/).