Lots of variables there. No short answer.

So here's a short answer: 3-6 months on reserve. 3 day average trip.

Timing matters. More regular lines/fewer reserves in the summer than winter.
737 is a bit more senior than the other 2 jets you mention. So probably a bit longer on reserve.

Tons of movement for the bottom half of the seniority list these days so you can go anywhere and do pretty much whatever you want after your initial seat freeze expires.

Only advice is try to pick the airframe you want to be in unless you don't mind going back to the schoolhouse after your year is up. Some guys don't mind training. Some guys avoid it like the plague. Sitting in a hotel on Virginia Avenue for 6 weeks kinda sucks if your family is in another city.

Welcome aboard.