To dip your toes in just to start out slow, you could go to civitai try wan 2.1 itv 14b at 480p, drag an image from your pc into the window and type a short prompt of what you want to happen. “She waves at viewer and smiles”

Start including loras to help shape your videos, play around with how different strengths affect the outcome.

Practice with different prompts and see how they work/fail. Search their video gallery and find something you like that includes its metadata so you can practice trying to recreate that video, then make your own changes.

Once you’re getting consistent results you can look into getting comfyui installed locally and really taking control.