Registration Page - Field Labels

On the Registration page I have fields for

username
first name
last name
nickname

then under some others I have
name (required) (Buddypress I think)

Five fields for "name" is pretty much overkill. How do i get rid of some of them?

In the buddypress profile fields I had the option of labeling "required" or "optional". How do I do that with the M2 fields?

Should I be using just one or the other? How do I manage that?

I find the whole registration thing very, very confusing.

I granted access to the website about 12 hrs ago for the purpose of allowing your staff to fix it so that people can't access content until they have paid.

Please feel free to also access for this issue.
Thank you so much!

Thank you.