Usually in my free time I take various courses, as it helps a lot to develop. At the moment I'm taking Salesforce online courses. I really like them because they explain the material well. Therefore, if you want to somehow improve your skills in development, then I advise you to start doing these courses too: https://www.crsinfosolutions.com... I'm sure you will like them

work on side projects

I like to write articles for my website where I review SaaS products.