As a completely heterosexual male with interest and some experience in the world of D/s, I have been led (by my prior Mistress) into the arena of forced bi.  My question, is for fellatio, is this best first done with a sensual Domme who is TS or should I have my Mistress train me on a real male?
What are the pro's and con's I should consider?
Most sincerely,  Thanks
P.S.  Any recommendations on Sensual (not harsh) Domme TS who can lovingly help me over this hurrdle with a nurturing, yet manipulative attitude?

Why do you need a domme?  You don't need to be forced since you've decided you want to learn.

Many TS's are good with first-timers and will be patient teachers.  Seeing one of them -- especially a beautiful feminine one -- will turn on the hetero side of you while you're learning, and that should lead to other adventures.

Check the reviews for mature but hot TS's who are not divas.  Someone like TS Barbie/Britney might be a start.