61 is just too small, 76 or thereabouts very good happy medium, weighting doesn't really matter unless you really want to learn how to play piano pieces on a piano (in which case it does). Tons of stuff on youtube - if you can't read music, then use this opportunity to learn a little - it's a slow process, but when it clicks you have access to so much stuff to learn the workings of that it feels a bit like cheating if you've always played by ear.