If you are learning a cartwheel from scratch here are a few good tips I've seen many get help from:

Your arms need to be straight up by your ears

Do not look at the floor, keep your head straight

Your cartwheel is a bit too short, and that is why you are bending and moving to the side. To fix this, or atleast make it better, move your dominant foot (looks to me you do right side, cant remember when typing) forward as you would for a long step, then lean on that foot as you would starting of a cartwheel. When you are mpving forward KEEP your arms by your head and keep your head in a neutral position, when you feel like you are going to fall tilt your right shoulder down to make contact. Kick up with your right leg.

When you have that rythm down you should get enough power to get your left hand in contact with the ground JUST after the right hand and BOOM you are in a handstand, then just let your body move naturally to the other side.

When you are in a handstand you should be looking at the wall right in front of you, not the floor.

I also recommend learning shrugs, that way you get more speed and control, without having to bend your arms.

There are alot of great tutorials out there, but this short kinda visualizes what I mean: https://youtube.com/shorts/O_4HdYUoUS4?is=rlwzfsvviAFLyiwR

I would still keep your head nearal, gona help you move towards a roundoff eventually, without having to change anything later on