I am new to BD and allready in Love

And I am looking for an anal toy.
What I am looking for is some thrusting potential, a possibility to make me feel "full", if possible some prostate stim and of cause nothing that is going to rip me apart.
I am not a total beginner to anal toys, I own a plug, the FF Duke which I use from time to time but its nothing like a Bad Dragon

I did a bit of reading and the Gryphon, Breeder and Naga seem beginnerfriendly and seem to be able to thrust well because of their "thin" shaft and I think if I push them in completely they will make me feel very full with their knots.
For size I think about a Medium Gryphon, a Small Breeder or Small Naga.
Did I oversee something? Or are my Size thoughts a bit of track and I sould consider smaller or even larger toys ?Or anything other you think I sould consider while choosing the Toy for me
Greetings
Arandun