Recently had to help a relative who still uses windows, so here's a freebie from Linux:
You can use super + number to launch any pinned program on the taskbar. For example let's say you have your browser right of the start button and file explorer on the next spot right, pressing super+1 launches the browser and super+2 the explorer
Edit: super = windows logo key
If you feel particularly nerdy and love stats and graphs, here's a rabbit hole for you
https://bkbilly.gitbook.io/lnxlink