Try functtional programming using ramda.js to step up your js skills; try putting up a prom & grafana stack for monitoring, try using something like django & dr

Try functtional programming using ramda.js to step up your js skills; try putting up a prom & grafana stack for monitoring, try using something like django & drf for your APIs (django is somewhat a large web dev market & is really solid, DRF will make you go lighting speed on your dev, it will also step up your permissions programming skills) ; work up to 100% coverage with unit tests and then write e2e tests that reflects the specs, ElasticSearch is a valuable tool to know as well (for logging or be it to use it as a search engine for one of your projects) - get 100% score on web.dev, do not use any css template and actually master it (all that flux / grid system is still a mess for me) (use variables etc..., maybe even scss or sass to be able to loop and whatnot) ; the list could be lot longer but one thing i learnt is that iterating on architecture is a lot more beneficial than spitting out features