The road to getting your wings is long and difficult for even the most highly motivated and not all of them succeed. The fact that you are having doubts before you even start is a huge red flag.

On the other hand, if you want to do it then you wont regret it but do it because you want to be a Naval aviator, not because you might be able to make an airline career out of it on the back end. Same advice applies to choosing a community. Picking P3/P8 because you might end up in a 737 is a recipe for dissapointment.