i would like to be smarter then i am `
If you want to be smarter, keep an open mind and keep reading. If you keep an open mind, you can learn whatever you want. Don't think that you are done learning now. You can always learn more by reading, taking a class at a community college, or just by talking with others.
I've been building engines for over 30 years. I still find people who know more than I do by talking to them. I like to talk to them and listen and learn from them.
If you want to learn more about fixing your car, buy the service manual for it and read what you want to fix and give it a try. Don't worry if you have to reread the same thing 3 or more times before it sinks in, that happens to everyone.
If you have the desire to learn, you can always learn more. It's when you shut down your mind, that you stop learning. It's your attitude about learning that will enable or disable your ability to learn.