I'm on it if u want some extra hands

Get some webhost
Register there
get the FTP Details
Fill it out on FileZilla (for example)
hit connect

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step 1 is done
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Download a forum software:
Free: MyBB - PHPBB - SMF
Paid: vBulletin - IP.Board - XenForo

Upload them to the server
go to your website (if you pointed the NameServers or IP's to it.)
go to the folder/install/
follow those steps
create a MySQL database
fill out the MySQL Database information on the forum installation
create an administrator account

Congrats you installed your forum
now configurate it with forum sections and set up the permissions

Congratz your forum is now ready for usage