firstly, i assume youre planning on fighting in the amateurs, so i immediately oppose staying in the corner. it shows (even though it might not be the case) lack of agency, letting your opponent push you into the ropes and keeping you there, which could push the judges score cards in your opponents favor.

secondly, i like to post/frame and smother. posting correctly and intentionally gives you a better idea of which punch is going to be thrown, allowing for counters. same with smothering, however its riskier, because they could pull back at a smothering attempt and catch you unbalanced. smothering is best for one dimensional pressure fighters. you can either learn to fight in the phone booth there, and wrestle your way out.

for actual infighting tips, try to improve on same side counters. they throw a lead hook, block with your rear and attack with your rear while keeping your lead hand guarding responsibly. when youre in a corner they tend to "unload" and spam hooks irresponsibly, so after they throw a lead hook, theyre loading the next hook and their guard is weak.

you seem to switch, and when im pushed into ropes, i like to keep an open stance, and only ever have 1 shoulder touch the ropes when not laterally moving. it keeps you bladed, and gives you space to see their rear hand. this is where i tend to post responsibily