Point me to a recovery and a ROM... PLEASE!?

I'm trying to figure this out, but I'm getting tangled up in my underpants. I just want to salvage my old Galaxy Tab 10.1 P7510. It is old and slow and stupid. I've managed to put TWRP 2.2.0 on it, but that is it. I try to find a nice new shiny ROM, but get overwhelmed quickly. I thought I found one, but it needs a newer TWRP to install it, which I can't seem to find. Can someone just point me to a working TWRP (or CM) and a ROM that will work on this old tab? I will try to install them without asking too much help. Although I'm not sure when to and when not to check USB debugging box during the process. Anyone, anyone? Thanks.