..." OK. You have asked a lot of questions and I understand that not being a US citizen but a permanent resident. Generally, if you have asthma after your 13th birthday you would not be physically fit to enter the military, any branch.
If you do enter the Navy I would not recommend being a diver. If you enter the AF I would not recommend you being SERE/ParaRescue. If you really have a severe weight problem you will have a problem enlisting.
You have a lot of things mixed up because you have little experience with the US military. 1. No family ties is GOOD.
Too many people enter the military "with" family ties and being single allows you to really experience the military without considering anybody else but your own self. And, your money will go farther because you won't have to support others. 2.
You can not enlist for 8 years. You can enlist for 4 or 6 years. Try 4 years first.
Then, if you really like it you can reenlist for another 4 or 6 years. And, if you REALLY like the military you can advance yourself and serve 20 - 30 years of service, if you remain qualified. 3.
Bad eyesight and weight? Depends on what you mean by bad eyesight. Is it correctable to 20/20 with glasses?
No problem. Weight? Now that is a different situation.
Only the medical people can pass you or fail you on weight. 4. If you join active duty military you will serve active.
If you join Reserves or National Guard then you will serve in their part-time capacity. 5. Pay check: It is the same for all the US services.
You start out with $1,339.00 a month (before taxes). The rest is all yours to do with as you need to. 6.
You can not realistically save your entire pay check. You will need money to do a number of things while in the military. But, you don't have to splurge it all either.
You should sign up for the Thrift Savings Plan and invest 10% of your pay into your retirement account for the future.
There's a long wait to get into the Navy and Air Force - up to a year. But if you have a high school diploma, you are healthy, and you can pass the ASVAB with a high enough score, you should be able to get in. If you are wanting to leave sooner than that, join the Army.
Either way, they will pay your way to initial training (Boot Camp/Basic.) You can serve for as long as they'll keep you. You can often re-enlist and do a full 20 years and then collect a retirement check, as long as you keep getting promoted and your specialty is not "down sized" (if it does they will often offer you a chance at a new specialty or to switch to the Army.) It would behoove you to choose a marketable skill as a specialty and to get an education so you can support yourself after the military. They will cover your education costs between "Tuition Assistance" and the GI Bill.
You can stay in the dorms or in military billeting even if you are on vacation. But you will get paid plenty, and you'll get paid even when you are on vacation, so there's no reason why you shouldn't get out of town and enjoy yourself a little. You'll likely want to unwind and pretend to be a civilian any time you are on leave anyways.
You'll also want to go out some weekends. It's a good idea to save at least half your pay, but you need to spend some of it too. You'll need haircuts and to replace your uniforms as they wear out.
You'll want civilian clothes, a laptop, maybe a game console or some hobby supplies, a cell phone, maybe a car or bicycle.
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