The key thing to do is just learn to fell comfortable in your boat. Get confident with edging, your 2nd & 3rd stabilities, and especially learn to feel comfortable being upside down.
As for boats... It really depends on what you are doing... I'm gonna assume it's just basic river running and you're gonna want a boat that will bash through anything, is easy to roll, and is pretty stable. I mainly sea kayak, so whitewater boats are less familiar to me, but a good solid river running boat is the wave sport deasil. If I were you id go onto manuracturers websites and see what they offer for river runners/river play. Ik wave sport, Jackson, and dagger all make great boats.
Hope that helps!
"Maybe youll catch me on the slopes. Ill be the dude rocking twin tip, center mounted park skis and steezy tall hoodies all the while struggling to land that basic jib across the flat box but LOVING every second of it. Every yardsale, even snow face wash, ill come up with a smile on my face." - rbean24