How to pump up knowledge of web development?

Question

css

Hello. For more than six months, I actually stopped working on the web, and forgot a lot (you need to remember), or slightly forgot, and before my pause, I was not a professional, I mastered something with html, css, js (es-6), I know in basic concepts of how javascript works, etc., but I never learned to write code normally, I could type up not very complex layouts, then I started using sass, jquery, bootstrap3, I learned them on the surface and used their easiest and most easily remembered things, then I started to react + redux, I only understood how they work approximately and what they are needed for in general, i.e. I understood what state, components , props, etc. are. Todo list crutch somehow wrote. Now I have decided firmly and confidently to return to web development, and I need to somehow repeat everything that I have previously mastered and return, let's say, to where to stop, who can help with the materials,