I would go for whatever is the most stable long term.
If you know someone who can get you an "in" with a federal or state job, that would be my first pick...(examples, DMV, Board of Education, office jobs at the legislature, whatever, board of water supply, land and resources, prisons, jails, social services anything...there is tons of stuff - just ask around, be creative and do lots of searching, also if you live near a military base search for civilian jobs.) I know the federal tax buildings usually have lots of openings for mail room shifts right now because it is tax season. That is a good in. If you can get in, you'll be set, excellent hours, sometimes on site childcare, pension, retirement, benefits, ect.
2nd pick would be working at a bank. My sister did this and at 21, already owns her own home and they are paying for her to get her business degree. She had no previous experience. It is stable, pay is good, burnout low and lots of room to grow.
3rd pick would be some sort of healthcare training. I think there is a high burnout rate with this, and the pay isn't always as good as they say - and private school can be EXPENSIVE. But, there is lots of opportunity and if you go through a community college you probably will get grants to pay for everything. Even privately, you may get everything covered through grants and financial aid. Top picks for those would be:
1. Surgical tech (training is usually 18 months, pay is around $20 an hour or more.)
2. Dental asst. (training varies, as does pay, here they start around $12, but experienced ones make around $20)
3. Ultrasound, radiological tech - 2 yr degree. Pay is around 50-60k a year
4. Respiratory Therapist, or tech, - 2yr degree, pay is as above
5. Nursing will be your best bet in the healthcare field, but training is usually rigorous and competitive.
I wouldn't suggest something like cosmetologist, massage therapy, or home daycare. (I have done all three) The pay is *ok*, but the burnout rate and injury rate are REALLY high - meaning it will happen eventually. Also you won't have insurance or benefits, you'll usually be a private contractor, which just sucks when you aren't making a good amount of money and are a sole provider. HTH's.
You can also do a search here to find out about job outlooks, median earnings and job basics in your area - www.bls.gov
. The site is kinda hard to navigate, so if you need help, pm me with your area and I'll help you look it up. HTHs.