This is about playing skyrim as an advlt. With like.... a full blown life outside of the game.
Dude I'm 44 with 3 kids, 2 ex wives, a gf, and two businesses. I work out and live by myself so I have to cook my own 6 meals a day (it's a bodybuilding thing) and cook for the kids, do all the laundry and cleaning. I will be playing Skyrim 3-5 hours every night. It's all about prioritizing and optimizing your time.
You might read the 4 hour work week by Tim Ferris. I used to be frazzled working 16 hours a day and weekends, out of shape and getting yelled at somewhere by somebody for something and often yelling back. Now life is smooth. I invested my time and money into creating passive income and now I only work about 5 hours a day when things are running smooth and often get both days off on the weekend. When things get a little out of control I'm working a weekend or going in at night for a bit to get that 8 hour day in here and there. But I'm always looking at ways to optimize things so I'm getting more time to do the things I want to do. I pick my kids up from school and take them to their activities, have sit down meals with them, and I'm slowly building the life of my dreams that is under my control.
It all started about 4 years ago after 20 years of being stupid. And I'm a smart guy, but it's easy to get caught up doing stupid things because you think your going somewhere, or it feels safe, or it's simply what you are used to. But the reality is you need to set goals and make them happen. The reason you can't have any fun is because your too stressed out, and out of control working that job and going to school. You can't really let loose and get your head inside the game because you can't let go of reality. It's not that your too old, your life is full of a lot of crap now, but when you were 15 the only goal was to have fun. Now your goals are to go to school, raise your kids, go to college, and hit that obligatory poker game for some reason, or watch that boring old movie because it's safe or reminds you of a time when you were young and felt better about stuff.
Good luck, and I sincerely hope this sheds some light on things for you so you can enjoy game time again.