The steps are simple
shot:freenom.com;
Step 1: Register a domain name on http://freenom.com
shot:tcihosting.gq;
Step 2: Navigate to http://tcihosting.gq and click on create a forum and input your desired category and name of forum all this can be changed later on
shot:tcihosting.gq/create;
Step 3: Check your mail the details to your forum will be sent to your E-mail

Step 4: Edit your forum to your taste

Step 5: In admin panel park your forum to your free domain

#TCI; made this Hosting Feature to make creation of Mybb forums Easier

Contact me @admin