Redirect to a subdomain from the main site for users to Sign Up or register.

Hi,

I want to redirect users from the mainsite to a subsite of my multisite install. So that in that subsite, users can choose to login, register or sign up for a new blog.

Now, Is the subsite i prepared will be accessible to my multisite network in terms of, community, forums, new user registrations, signup, logins, upgrades, payment, donations, payments, etc...

Thank you!