Hey man, as for going back to school later, professors will love you for being a little older and being able to focus on what you are there for, namely paying them to teach you shit. The quickest way to a professor's heart is to be interested in the topics at hand, and I have a feeling that comes easy for you. And assuming you won't have any student loans to deal with, enjoy that fucking experience for the gift it is...if I could go back to school for free, I would do it again and again until my brain was so stuffed, I'd have to start looking for some kind of transhumanist external memory options. Fucking love me some schooling. You going for a BS in something? In my experience, there will be plenty of mature students to talk with if you get annoyed with the kiddos. I had a doctor who went to med school at 40. People with life experience are so valuable and interesting in any field, I think.
Also interesting that you feel life is so beautiful. I tend to vacillate between the extremes of thinking life is a big web of gorgeous spiritual energy and thinking it is utterly, brutally animalistic and devoid of meaning.
Often those two feelings hit me at the same time. Probably pretty common.
Curious about the field you are taking a Coursera class in. I signed up for a big python programming class, because little puzzles like those in simple code relax me, but I got really into it and then they wanted me to pay money before taking some of the quizzes, which had never happened before. I hope they aren't going to start pushing for cash all the time.