Can any Kanjidamage users help me out?

OK, so, I've just finished learning my kana and want to go onto kanji. Heisig was good but a touch too dull for my liking, so I'm going to try out Kanjidamage.

All I'd like to know is, what exactly do I learn? Just the mnemonic/keyword, or the kunyomi, jukugo, etc.?

It just seems like an overwhelming amount to learn for each one the first time through, and I'd like to know how others who have used it went about it.

Thanks.

kanjidamage newbie myself here. Can someone tell me what the punctuation means in the kunyomi readings? For 'dream come true' the kunyomi is put as: ( が ) かな＊う
Why is that が seperated by brackets, and what does the asterisk between な and う mean?
Sorry about this...