BuddyPress.org

im trying to set up a new site.
using learndash and also have the uncanny toolkit, also have buddypress installed, but when I create a registration page, it looks like its using buddy press registration.
added this plugin and have a login/logout page and a registration page:

Home

but when I register, get an email, click on the email confirmation, it takes me back to the website saying verified. but when i try to use the username and password I entered it didnt work? jut says Oops! Invalid username and/or password. I have tried this multiple times and all the same.

my main aim is to get someone to register when they want to take a course e.g. this course.

How to get promoted

any ideas on what I am doing wrong or missing?