Make a passphrase you can remember.
A few random words are easier to type and remember than a jumble of symbols, and just as hard to guess. Everything is generated on your device.
Type
Between words
Words come from the EFF short wordlist (1,296 words, CC BY 3.0 US). Five words are enough for most accounts; use six or more for a password manager’s main password. Nothing is sent to a server or saved.