routerboard and pfSense

Hi,
I have to create a vpn using the latest version of pfSense, and give access to it using a routerboard.
Where can I find any info/tutorial on how configurare both of them in a compatible way.
Sorry for the not so precise questions, but this is not exactly my job, so please ask if you need more details.
Thanks

For the Mikrotik, you can check on the wiki:
https://help.mikrotik.com/docs/
https://wiki.mikrotik.com/wiki/Manual:TOC