does anyone know the coding to add for a public discussion board? Javascript, CSS

Site URL: https://behaviorspeaks.co

Hi, does anyone know of a code i can insert to add a discussion board? I have access to Javascript, CSS and im not sure what else! If anyone knows it would be BEYOND appreciated! 

I think an easier solution would be to embed a service like Discord instead of programming from scratch but that's just me.

Disqus would be another option.

Or you could go for a full fledged discussion forum such as the one SS uses here for it's forum. SS buys this forum as a service from a provider. This option you don't integrate into your own site, you just link to it.