"Writing into stone" some tools and links that have help me learn and improve my designing skills. This can actually come in handy for any other product designer out there, so let me know if it helps!
For designing your work. Figma is also a good alternative.
Sketch Runner Plugin
For speeding up your workflow in Sketch.
Artboard Tricks Plugin
To keep things tidy on Sketch.
Principle for Mac
For animating your design.
Document your design, brainstorms, briefs, or ongoing tasks.
Great tool for designs who don't know how to code.