I'm stuck not being able to properly onboard users on wordpress

Hello here. I've decided to launch my membership business using FC but I don't know how to create a good onboarding flow. First with user registration and login, is fluentforms enough for that ? or should I go to fluent auth (which I can't customize unfortunately) ?

For now I have the "woocommerce my account" as signup/login page but I'm not yet happy with it. I'd love to have a step-by-step onboarding questions like any educational apps collecting people preferences, age and goals... Maybe the fluentforms conversational will work but I'm not sure it's good for login and signup. If so I'd go straight try it.

Please can anyone share ideas I can implement.