Beginner Question- User Tables

Thanks in advance for any help! I’m creating a website for new business and in a nutshell: I want people to be able to sign up including varying information besides their name and email (think similar info as survey information). I want that information to be saved in a searchable database that I could put on another admin page or something along those lines.

In the future, I’d like to be able to search for certain groups and send emails, etc.

I have some programming background from my undergrad, but no real wp experience so feel free to share plugins or specifics if at all possible.

Thank you very much!