Ditto what Whitemonk has said.
The 757 is an option, however
1 - it is MAN base only, so your move to BFS wouldn’t be an option.
2 - you questioned about time to command, the B757 pilots generally do 3-400 hours per year max, therefore your time to command would be extended.
3 - why would you do a type rating to join a fleet that will be gone in a few years, and then have to do another type rating, we all know that doing type ratings is a pain in the butt.
In my opinion, forget your boyhood dream, it’s just another tin can doing 500mph at 30odd thousand feet, join and join the B737 fleet.