I'm so impressed by you for even considering it and I can tell just from your message that you'll be successful. You made what sounds like a very difficult decision in order to better your life and you have a wonderful, energetic partner to help motivate you (i.e., kick your butt) when things get difficult or you lose focus.
Take a little encouragement from my brother. He's 50 y.o., a former Army Airborne guy who has damaged legs and eyes (he's legally blind) and he's back in school. And, in keeping with his personality, he didn't take the easy road. He's getting his degree in Chemical Engineering (one of the most difficult fields) at one of the hardest schools (Missouri Science and Technology) and he's a 4.0 student. You can do it too!
Don't forget...we're cheering you on!!
I'm Yarnrainbow on too.