I need to create a register and login link on my home page.
Users get to take a quiz on their profile which they can update and what gets posted to a database.
How can I do this without interfering with the wp-login?
All needs to be done on the front end.
As for the custom login/registration piece, there are tons of pre-made plugins out there just for this. Here’s just one example
If you want to develop your own there’s plenty of beginner how to’s all over google on the subject.
Again here is just one
As for the quiz piece I’m not sure what you mean, would you mind clarifying?