What age do you think is too old to consider joining the military?

Joining active duty is a plan. The active duty military is a career choice. If you just do the bare minimum, and don't try to excel you will still have a successful career. At the end of 20 years you will have a Pension that pays you out immediately and will supplement your income until retirement. You will have a 401K with matching contributions from your employer, you'll have discounted Health Care Oh, and if you just apply yourself a little bit You will at least have a bachelor degree. All that, And you will still be young enough to start a second career, and had a GI Bill that will pay For you to attend training and receive whatever certifications you need for your next career.

If you're willing to put a bit of work in you can retire at a higher pay grade, or as an officer. You can separate with a fully paid Masters degree, transfer your GI Bill to your dependents, develop the experience and contacts be competitive to transfer into the next career of your choice, and earn skills and certifications prior to separation.

For instance, I joined as a cook. I attended airborne and Ranger school before separation. Then I rejoined as a medic. I applied for PA school, which didn't work out for me, but for my colleagues who were accepted, they are now PAs who are racking up medical certifications while the Army paid for their school. Now I'm a Career Counselor. The civilian equivalent would be a program manager. I would need a program manager certification to be competitive at that if I chose - the Army or my GI Bill would pay for that. I will have my Bachelor's done before I retire and could pursue a masters if I wanted.

Join now, go to college on active duty. Progress as you go. Embrace the 80% solution, don't wait for things to be 100%

My Battle Buddy in Basic Training was 35 when he joined. He was able to keep up with us 17-18 year old troops.

At the very least, if you don't currently have a long-term plan for what you want to do after the Army, then the Army will provide you significant stability to figure things out over time. You can work on your degree while you are serving, but expect it to take longer to complete, due to needing to take 1-2 courses at a time, and having potentially large gaps when you are deployed. If you join certain MOS', you can get a significant amount of college credit from local colleges that award credit for AIT completion. That can put you closer to completing an associate degree.