You only need to sign up for the basic plans unless we have discussed otherwise, and no add-ons are necessary except for domain privacy, if desired.  Just click-through to go to the corresponding website and sign-up.

Your account can always be upgraded later and any add-ons that you would like can be installed anytime. 

You may also purchase Domain names from any of these companies, or transfer your existing domain to make things easier for yourself and keep everything under one login.