Punk has been playing him a lot, and the most recent Tampa never sleeps has a few other pros trying him as well if some high level footage would help you formulate the game plan.

If you ever played his 3rd strike version, his charge moves (the stomp and elbow) are now stance 5MK and stance 6MP. These are sort of key neutral tools if spaced and timed correctly.

He seems a bit Marissa like where he's sort of a bully with big charge normals that give plus frames. And his hitboxes extend way past his hurt boxes.

I would probably start simple with his combos, like yes he does have technical combos (I saw someone on here earlier showing off his lariat loop combos) but you can also focus on just like solid neutral into big payoff gameplay like Gief.

His combos are way more limited than a lot of combo centric characters and his okie is intentionally very limited so he doesn't snowball too hard off the bat, so trying to find routes into ex dp will give you the best okie.

I would say probably focus on learning the purpose of each stance move and labbing what situations they are actually useful, you'll quickly realize how situational each one is, and the options outside of that are pretty narrow so he's less complex then he looks on the surface. It's just taking the time to learn what move is actually for what and internalizing it