there are some seo addons which do at least part of the seo work/ make it easy to apply the right settings. but in general i would recommend to actually read up on seo practices in general (non xf specific) to start with. you actually should understand the basics (applying to any website) in the first place in order to make informed decisions. not every little thing needs extra addons to be applied. also not having a grasp on what you are actually doing with the settings in some addons might make things worse.
Some of the more experienced admins can chime in a bit but I've always heard that Xenforo has amazing SEO built-in to the software. I've actually never heard a complaint about it. I remember when I used Xenforo for the bulk of 2013, i had fast rankings/high rankings. I am sure you'll be quite pleased with your experiences.
As far as tweaking or tips/tricks go, I'll leave that for the more experienced admins but for me it was a great experience and I didn't have to do anything major aside from setting up friendly URLs