[TrK]

Deciding a forum platform is not simple it depends on many aspects i have too much experience working with mybb since it was always my first choice to go because of its plugin structure being too simple to work but simplicity is not the only factor if you are looking for a small community i would suggest you take a look at Flarum, Carbon forums and discourse. In these three choices for a small and minimal community i would go with either Flarum and Carbon forums as for discourse it would be a great asset when you got a large userbase i am not that familiar with carbon forums but for flarum and discourse i did had some experience installing and testing them for fun and i can say discourse so far is the only platform being in use by Mozilla, codecademy, howtogeek, etc. make sure you have a good enough server for discourse as for flarum and carbon forum it is possible to host both of them easily even inside a shared hosting environment. Hope you choose based on your userbase and carefull consideration.