nope lol it then goes after medium: advanced medium, advanced, PGC and grand prix (what you see on tv :P!) (i think correct me if i am wrong anyone!!).
As for saying a medium dressage horse is not forgiving that is not always the case i started in a sort of similar position to you (not a novice but incredibly nervous after breaking my back and had lots of bad habits from riding a cob before buying my new one), i bought a horse working at medium level dressage and jumping newcomers (1m 10) and he has been the most forgiving and kind gentleman i could have wished for (the one in my profile picture). He has boosted my confidence so much in the 7 weeks i have had him, so much so i am now jumping again already and have gone out and done a dressage test on him (just prelim - the first level). So this horse could be the best thing you have ever bought if it is forgiving and a schoolmaster!!
Just make sure you ask about tempremant and how sensitive it is to a riders seat and aids. If very sensitive and not forgiving it probably isnt right for a novice rider