Have you ever wondered what you could do with the regular expression filter on each Mastodon channel, but you don't know regex, and every time you try to learn, your eyes glaze over?
I recommend this starting point:
https://www.regexone.com/
It's an interactive tutorial that starts ultra-basic and lets you experiment at your pace.
Alongside that, try:
https://regexper.com/
Type or paste in a regex, and this will generate a visual map of exactly what it does. Essential, even for veterans.