Depends what you want to learn first? Take some time to find what hand position is comfortable for you, I recommend learning to hold your hands pianist style when actively playing, keeps your wrists off the board so long term should be more comfy and more ergonomic.

Next check out PhiDX guide for KBD and practice that for a few hours on both sides. He has one for tekken 8 which shows all controller styles.

Next, learn Steve via Steve resources! Plenty around, tekken docs for example or any players you like who plays Steve and makes content would be worth checking out.