Thinking of training into this career field... Advice? Background.

Long introductory post, sorry everyone!

First off, I'd like to say that I'm currently not in a technology-based career field, and I never have been before. I(34yo)am a military veteran of 9.5 years as both a jet engine mechanic, and flight engineer who used some of his GI Bill,after separating the military a few years ago, to get into a manufacturing career field. Currently I'm a welder/fabricator/machinist. My problem is... It's getting harder and harder on my body, and I really don't enjoy it as much as I thought I would. I've had numerous family members tell me this isn't what they always imagined I would end up doing, and I'm starting to agree with them. I see some of my coworkers, some getting pretty advanced in age, and I just can't see myself doing this type of work for the rest of my life.

SO! Enter the reasons I'm here, and making this post! I qualify for a veteran training program that will pay for schooling, equipment, certifications, and any and all training I may need to find a new career path, while also helping me find employment IN my chosen path. My father has a degree in network engineering and suggested maybe I look into this direction of career field (he suggested network security, or cloud security/management), and while starting to explore ideas I came across the Network Architect career field as well.

Since the VA will be paying to train me, I've come here looking for advice from you all! I've always been interested in computers and programming, building and upgrading, and setup and teardown and troubleshooting simple computer problems, but I have no formal education to speak of, so I'm trying to figure out where I should begin.

Do you all recommend a minimum of a 4 year degree program? Or can I get by with technical training and certifications? At this point, I'm afraid to start something new (again) and no longer even know what kinds of questions I should be asking...

Help me out guys, I still don't know what I want to be when I grow up!

TLDR: middle aged military vet seeking new career path