Learning software from chemistry is boring !!!!!

There are so many things to learn. I know too little !!! Databases, operating systems, XML (this is something I have never touched on )......
What should I do if I learn more and understand my ignorance ?????
I didn't take my favorite major in college, but now it's really difficult ???? Self-taught ????
It seems that the best way is to attend a training course by yourself, but there are so many tuition fees !!!
I regret learning Java ??? Actually, it is a language like English. It is just a tool for expression. The key things are the content to be expressed in Java. This is what I lack most now, at the beginning, I first became proficient in a little bit, and then gradually started using this point. Now I am concentrated on learning the corejava book.
The writing is very considerate to readers.
Remember: Eclipse is a tool, and corejava is the core thing. When you are tired of learning, using eclipse To Do Something should be a kind of toys.