Everything everyone said above.
Also, know that some of the best flying to be had in the Air Force these days is flying the line in a UPT squadron. You will never fly more with less prep work than you do there, and you will hone your airmanship and competence in the airframe to an extreme degree. And yes it's very nice to basically check all of the boxes for your airline application in your very first assignment.
One downside: if you are a guy who has their heart set on weapons school, know that you have a huge game of catch-up ahead of you. When you eventually get to your MWS you will be well behind your peers in tactical knowledge and the time window to apply will be rapidly closing as you will be a mid level captain at that point. Definitely seen it done, just know that the window of opportunity is small, and closes quickly.