How to get to next step

So I’m in an IT job where I replace/install computers ok?
I know some Java, SpringBoot, HTML, CSS… Fairly simple projects so far around processing requests, performing DB access etc…

I’ve been able to practice some powershell although it’s not a program so I decided not to any scripts to my guthub.

From here, where can I go next to get closer to code without applying for developer jobs? Haven’t heard anything back from any developer applications I made.