I have a question about datasets

Hello, I’m having hard time dealing with datasets, and I’d like to ask a question.
So I’m trying to make each member of my website to submit a form I created, which will be displayed on his/her personal member page. (Which obviously is exclusive from other members but him/her) It’s like I want every member of my webpage to have his/her own page that describes who they are, what they like, etc.
However I realized that there will be two separate datasets created-one with personal information of the members(created when signing up), and one with the information of the form they submit.
And this is as far as I got. I think I have to either ‘synchronize’ or ‘connect’ the two separate datasets, or move the info in the latter to the privatemember dataset, which I realized is impossible. Is there any way I could solve this?
If you need further elaboration, please feel free to ask.
Thank you very much.