If you are really interested in physics, then you should always have a book about it within reach. If you are not lucky enough to be a position to study full time, you have to find a way to study in the margins. So, the first step is to start finding books, either hardcopy or electronic that you can read when you can spare a few moments. It also helps to have a notebook and a pencil. I have found it useful to actual copy the text of a section of a book or article verbatim by hand and work through problems as needed.
It also helps to use online sources like youtube to watch good education videos. The hardest part in all of this is probably trying to filter out bad physics from good physics. It takes a long time to develop a sense of when things are good papers and when they are flatly wrong. And, as always, spend some time to learn fourier transforms.
One thing that I would work to understand is that while some people have natural talent when it comes to basic skills such as mathematics, in the end it is really a question of dedication and time (see the book Outliers which discusses the need to work at something for 10000 hours before you can master it).