The biggest question always is where should I start. If you google how to code then there are many sites that try to help you but at one point they ask you for money.
That's why I want to share with you guys how it all started for me. I found a site called https://moocfi.github.io/courses/2013/programming-part-1/ which is totally free and is really helpful for beginners. Everything is written out so easily and there are always some fun exercises after every chapter. Putting theory into practice is very important.
At some point reading how to do things got kind of dry for me so I wanted to try something new. I just googled "fun java projects" and found some fun ideas about what to code. I just didn't want to solve an exercise, I wanted to get something done, something bigger than before. So at first, I found out that I should try to make my own MP3 player but unfortunately it was too hard for me. Then some other projects which were too advanced as well but finally I found something and I got it done, my little cute price converter.
When you are coding a bigger project you will learn so much at once. While doing converter I learned so much about GUI, how to get live price data etc.
The bigger project seems too hard? Don't give up that easy, try to google for solutions. Google is your best friend, you can get everything from there. Also, don't be afraid to ask for help. Join coding discords, feel free to chat with others even if they got much more skill than you. In my experience, they are always ready to help beginners.
Let me know if you got any questions!
Peace