Start by reading our plugin codex page:  https://simple-press.com/documentation/codex/plugins/our-plugins/available-plugins/polls/

it should give you what you need. 

Have you enabled polls in the forum(s) where you want them?  Do users have permission to create polls?  

If after checking that out you still have issues, come on back. 

Thank you very much!

You’re welcome. Sound like your are good.