Christopher,
The surface of the MWF pucks is very hard, and most first time users do not load up the brush sufficiently.
As Victor has said, if you mill the soap, the brush loading is easier.
There are some videos on YouTube covering MWF lathering, such as this one by Mantic59:
YouTube - How To Lather Mitchell's Wool Fat Shave Soap
Have fun !
Best regards
Russ