Welcome brother! It was wise to pass on that "shaman" thing. Most of the times a real shaman will not even claim he's a shaman, or anything more than you.
The real shamans I've heard of all claimed that they were just simple human beings fortunate enough to be chosen by the molecule to be a pillar of connection - that is to translate the molecule's magic to the user. Nothing more, nothing less.
I always advise people to extract their own DMT and not buy it from anywhere, since there is a very high chance that the extraction wasn't done correctly and there are still some solvents and other dangerous chemicals left after the extraction.
Glad you have the opportunity to extract your own. It's the right way to do it.
Safe travels and enjoy your stay here.