a newbie strategy would be to run a blog on a somewhat serious (showy) site, like medium, then create in-depth content documenting a project that you are doing, writing in an informal, casual tone, and segue into theory posts, plagiarising content avariciously from other blogs, text books, guides, videos, etc   adapting the text to your style while keeping the content steadily progressing towards the end goal

tone change

pick a project, set a goal and a deadline 

keep writing code

log your work on the blog along with your feelings and findings

when you are stuck, take a break, read other blogs, ingest, and expew the contents in your blog

keep going until you can't recognise yourself in the first few posts any more

ditto for the code

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the github can be an interview ace card

the running code can be a product

the blog can be your entry into the text book market

ps: nothing original about this, this is what my eyes have been seeing all these (20+) years but not my brain