As a person picking up samus (and hopefully keeping her...), what should I work on alone? I don't get a lot of human practice before my monthly regionals.
recovery stuff. bomb jumps and rising grapple (there's some video tutorials listed here).
other than that, yeah basic movement, wd out of shield into tilts and stuff. you may not use it in-game just yet, but you'll get comfortable with the character by doing so. get some ideas somewhere?
if you think you're more advanced than that, try... basic practice on cpus, learning which moves get them off the stage, and which ones keep them off (fsmash/dsmash or uthrow-->bair/nair and missiles to get them off, utilt, nair, or angled fsmash to keep them off, generally.), stuff like that.
if you ever find yourself in bham again let me know and i can give you some training if you want. it's either 'mindwrecking with pcp' or 'gettin' filthy with andy' for samuses here, your choice.