Need some help :)

Not a software developer, but I built myself a trading program, realized i needed reliable backtesting so built a reliable backtesting engine, realised that it has value way beyond me testing my own strategies, built a strategy builder for others to be able to build strategies. Realized my streamlit UI woth an embedded react element for strategy building wont cut it for deployment, refactored backend to fastapi front end to fully react.

Now, Im on the cusp its essentially an MVP but I realize I dont know shit about deployments, databases, user auth, setting up payments by user account…

Im self taught, both in trading and programming, and im looking for either A) where tf I can learn how to link up user auth to let people create accounts, pay for expanded access, and how to set up data bases for users to store account information including access levels, strategies they make etc.. B) a full stack expert with room in their schedule to partner with me, help me do these things as a mentor or a partner in my startup in exchange for a percentage of the company.

What I have is the program and the domain a partner ready to make the marketing happen, I need help to learn how to make it full stack and deploy it live to the market.