Keep a “cheat sheet” of common commands printed out nearby-- either something from the internet and/or a custom one for your own commands.
Also, nobody can remember all the commands. We mostly just remember the ones we use most often. Otherwise, we have to look things up! It’s not too bad since you know that the command exists and you just need to know the exact way to type it.
Find mnemonics to help remember certain things. For example if you want to decompress a .tar file, you remember “xtract zee file” or: tar -xzf
Ear conditioning.