Follower
A follower is an individual who has accepted Religion into their life and chosen to align themselves with one of the four gods. In doing so they accept some minimal restrictions in return for their gods blessing.
The blessing is specific to each god and achieved when you have acquired twenty faith which you do through praying. The benefit is passive so you need take no special actions for it to be active. There are also minimal restrictions and the blessing and restrictions can be examined under each god's page, one each for Fo, Libila, Magranon, Vynora.
Process
To become a follower you can either make a pilgrimage to the White Light Altar of Three on Chaos or Elevation, or the Black Light Bone Altar on Elevation, or ask an appropriate priest or follower to convert you to their faith.
Requirements
To be converted you need at least 1.5 in your overall body characteristic, and at least 1.0 in your alignment if you wish to follow Fo. You must be stood still to be converted.
Notes
Once you've converted to a god your alignment can then change. Again read the page for your god to see what actions are relevant, being confessed or preached at by a priest will also help better your alignment. You can swap to a different god through the same process, though you have to wait a week after you were last converted. Swapping resets your faith skill to 1.
Once you have reached thirty faith you can then, if you choose to, become a priest yourself with all the restrictions and benefits that ensue. To achieve this on the Epic custer requires a pilgrimage to the either the Altar of Three or the Bone Altar on Elevation. On Freedom a priest with forty faith or higher can raise you from follower to priest status, or you can visit the Altar of Three on Chaos.