dont let yourself be discouraged by finger problems. Ive had carpal tunnel syndrome for 2 years and i played ffr for all that time and im still really good, im just not fast. Just keep playing and you'll get there 100% sure.
Set yourself short and mid term goals and you'll be fine. And AAAing easy songs aint gonna get u better, play stuff u find hard is how you improve your reading.

Feel proud of your accomplishments, no matter how small! You're going to need that self-confidence as you play songs that are progressively more difficult. Don't worry, you will get better with time. :) Also, try to play challenging songs, rather than AAA'ing easy ones. For example, let's say I could only FC up to lvl 5's, I would challenge myself by practicing on 6's.