Although you're seventeen years my senior, I'd like to offer any help/assistance I can. I just went through the process of "getting serious" with my life and I'm currently helping a friend out who is very much lost but has the desire to start getting serious about all this stuff (school, career, etc...) as well. Also, when I worked at Cummins, I helped out a co-worker who was about your age and wanted to get back out in the field instead of being couped-up in an office all day..
I'm currently a 3rd-year junior majoring in justice administration pursing a career with the state police.
Do you want to avoid this field altogether?
What I initially did was write out on paper any career that I seriously could see myself doing...and that ranged the gamut from diesel mechanic, state police, and the Army, to dentist and oral & maxillofacial surgery with many others thrown in as well.
From this "list" of possible career fields, get online and start researching them. Find out if they require anything that will be prohibitive to you.
At this point, I still had several choices left and found the biggest help was to go experience what the job is like.
Ex:
Police - Spend time at post and/or do ridealongs.
Mechanic - Go to shop and spend a day there.
Army - Talk to those that have been there.
etc, etc, etc...
The largest hurdle here is just getting up the guts to get in contact with people, but it's well worth it. Kinda like reading about how to ride a motorcycle...you can read books about it all day long, but until you get out there and experience it, you'll never have a true idea of what it's really like.
Mathematics isn't my strong suit either, but even in JA, you have to take college algebra and statistics.
The issue here with you is financially supporting your family (or maybe your wife makes enough to do this?) if you choose to go back to school...but if you have previous college experience, and are currently employed, you can take six credit hours a semester (two classes, as you know) while still working full time.
I'm sorry for my poor writing here...I loathe discussing things through typing that can be hashed out over the phone. On top of this, I just couldn't sleep and had to check BiTOG out, so I'm a bit "off" at the moment.
I'm sure others will follow with much more coherent advice, but if you'd like to talk more, feel free to PM me.
Jelly.