I realize this isn't answering you question but just thought I'd throw it out there for you to ponder.
You say you're going full-time, correct? If you are selling your stick house and will be living in your new rig, you might want to consider using South Dakota as your residency state as many full-timers are doing.
South Dakota has no special drivers' license requirements for driving a diesel pusher Class A motorhome (class A motorhomes that are 26,001 lbs. or over in their GVWR which include just about every DP).
They also have no personal income tax and have relatively low license fees.
You'd use a mail forwarding service to handle your mail and to advise and help you in the process of getting licensed and registered to vote, etc.
This is not a solution to your getting lessons on how to drive a diesel pusher but many in states that don't have drivers' licensing requirements for driving motorhomes, people just jump into their rigs and teach themselves. We are originally from Washington state which has no requirements for special licensing and many of our friends in WA who have purchased diesel pushers didn't have any experience driving large vehicles and virtually taught themselves.
Not that we encourage folks in avoiding getting properly trained. We are advocates of making licensing requirements for RVs standard from state to stage and having testing done before getting a license. Therefore, it would force everybody to get properly trained in driving a larger vehicle with air brakes. I'm thinking that someday that will happen.
As I've said before pertaining to this issue, DW and I hold Class B licenses in Nevada. Our Nevada friends who have diesel pushers had to get tested to get their class B licenses just as you would in Maryland. However, our friends in Washington can come down to Nevada and drive on the same roads with the same coach without having taken any tests or certifications pertaining to driving a heavy vehicle that has air brakes. It doesn't make sense not to have it standardized from state to state.
At any rate, obtaining South Dakota residency is something you may want to consider and research if you are going full-time.
-harry
ETA: oops, after re-reading your post, I see you may be living in your coach but still must reside in Maryland. Disregard what I've written. I guess you'll have to approach it from trying to find a motorhome training class somewhere.
ETAA: DW had this bookmarked for some reason. It's called "RV Boot Camp" where somebody comes to you and gives you lessons in your own RV. Maybe some members here can chime in as to it's legitimacy. It sounds interesting.
http://www.rvbasictraining.com/
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Have you contacted the MD DPS to find out what the requirements are? There are several discussions about license requirements on the forum, so you might try a search. 
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