Any advice?

Hey, need a bit of advice/recommendations. So right now I’m in the military and my schedule consists of one week I am off 2 days and the following week I am off 5 days and that cycle repeats like that. So I finally have the money to begin training for my ppl and I’m about to go looking for schools that are flexible with my schedule and saw that there are schools that you can do 2 lessons a week and that would take me 4-6 months to complete my ppl if I choose to do it that way. Would you guys recommend 2 lessons a week? And also should I do pay as I go after every lesson or pay the whole fee upfront?