Step 1:
Visit Strikingly.com, SquareSpace.com, or Weebly.com
Pick your favorite site builder. We suggest using a paid one. They are pretty cheap! (Contact us if you need reimbursement)
Step 2:
Create your site!
Step 3:
Buy a domain (namecheap.com is great for buying domains).
Follow the instructions on your site builder for adding a custom domain (this will require a paid account on your site builder).