How to add forum in blogger?

Hello. I want to add a forum to my blog which is running on blogspot platform. Please anyone tell me the way except google groups.

If you want to use Discourse, are willing to pay $5/month, and are not afraid of a unix command line, you’d get a Digital Ocean account, a mailgun account, and follow these instructions.

If you are willing to pay $5/month but are afraid of the command line, and you have another $99-$300, you can read Discourse Self-Hosting FAQ – Literate Computing, LLC.