How to creat a forum

how can one go about creating a forum. i want to create one but i dont know how to go about that. any help

See this > https://planet.ogbongeblog.com/t/best-forum-plugin-for-wordpress-blog/1500

What about for blogger blog

You can create a subdomain for your Blogger blog and point it to your forum site.

i mean a forum like https://planet.ogbongeblog.com, other words, i mean how did you create yours