Help with approach

So I am trying to open up my own business for a gym. I want to allow my customers to create an account and sign in. And i want for them to have a sort of personal profile where they can choose a type of workout they want to improve on and have progression charts. I am kinda stuck and how to approach this. I was hoping someone here might point me in the right direction.

Thanks!

In all honesty, there are dedicated specialist software and apps for this type of thing and I would strongly advise you look at that route.

There are all sorts of technical considerations for creating this for yourself, managing the build, functionality, upgrades and numerous complications with storing and controlling peoples’ data.

You will save yourself a huge amount of time, stress and money long term to work with a 3rd party expert platform.