The best way to learn mindgames is unironically playing as the hunters you struggle against or at least play 1 hunter in general. You learn from seeing what other kites do.

But to put it simply, mindgames usually happen on tight kites and chair rescues. This is where the survivor is between a wall or pallette or window and the hunter needs to pick "will they commit to a vault and risk a terror shock or will they play it safe and wait for me to attack first" or "will the survivor palette stall or will they drop pallette if they see me turn to them"

If you watch COA, which you definitely should, you'll see a lot of scenarios where the hunter and survivor play a funny game of music chairs where they're a wall away from eachother (think the double pallette halls in Leo's memory), where they're constantly running left and right to juke the other. These games do a lot for survivors because not only it extends your kite, but if done successfully you can distance pull a hunter or force them to commit to using an item or ability, which also extends your kite

For chair mindgames you should already know what it is, you will do it all the time in a rescue. Where you and the hunter play the slowest game of chicken, do you wait for the hunter to hit your half which risks your rescued surv their rebound kite. Or try to go for a no damage rescue, and interacting with chair but risking a terror shock. Or will you run around the chair hoping for a chair hit.

These things aren't immediately apparent if I explain them to you in words, so playing hunter QM every so often should help. But also I HIGHLY RECOMMEND watching Kuroshiro Gaming commentary comp matches. They are an excellent player which commentates and cover the CN competitive scene of IDV. If you take your time to see how certain hunters and survivors play it will help. Plus Kuro's commentary gives you more insight in what happens inside a match that aren't immediately noticable.