I've been playing guitar for 4 years now. I started off on acoustic, the a year or less later switched strictly to electric. I know fingering scales ect and I think I've done all I can with my left hand, but my right hand strumming is straight sloppy. Should I just go back to acoustic to clean it up or should I be a little more self conscious? Tips? Anything really, o would appreciate it. Thanks.

Soprano.i dint know if you're a lyric or mezzosoprano But really, where do you feel comfortable singing? Lower? Or smack dab in the middle? Where does your tone 'flatten'or thin?

If you already know how to play guitar and trumpet, piano shouldn't be hard at all! When I was learning, the hardest part was simply learning how to read the notes. After that, it's very easy to progress! Since I assume you already know how to read notes, piano's a fairly simple instrument - each key has one sound, no tricks around it. I definitely think it's do-able! So I'll give it a 3/10 on hardness.

How hard is it to self learn piano?

I have self taught myself guitar, and was taught trumpet when I was in band but how hard on a 1 to 10 scale is it to learn to play piano through self teaching?