new to suspension tuning help

[yz250337]

allright well i own a 06 yz 250 and i have never been much of a suspension guy more of a get on and ride and adapt kind of rider i have never touched clickers or set sag nothing but i have been reading up on it thanks to thumpertalk 👍 and last weekend i was out at a track and i noticed that my bike is really bouncy in the back end like it bounces through braking bumps and chop and is just really bouncy but i have no idea where to start like setting sag or adjusting my clickers or what and my bike lands really harsh if i dont land perfect on the downslope of a jump both wheels same time off the gas if i try to get on the gas on the landing it feels like it bottoms out help me thanks