Second time I've ever ridden in my life, suggestions for next time?

that's your second time ever?!?! man, i'm jealous LOL. i walked for months before attempting trotting, and i fell off the first time LOL. i've also had my horse a year and only cantered once, and it was a total accident. i have no idea how the hell i stayed on...it was my cowgirl moment hahaha. you looked really good. you're slightly tense and leaning forward a little, but whatever. you'll loosen up over time. and keep your heels down more-surprisingly it DOES help to keep your heels down when . it changes the way you grip with your legs, and actually makes it easier. you did really, really well though. keep up the good work!