The best way to learn proper English is to read news report, and watch news on TV. Watching TV shows is a great way to learn casual English, slang words, understand culture reference and humor. If you have already watched these shows then you may recall the words used in the following dialogs.

For a SELF portrait,
Westworld Season 2, Episode 9

so I can go back and tell my
younger SELF to give up, because
The Big Bang Theory Season 12, Episode 10

without revealing
my true SELF...
The Big Bang Theory Season 12, Episode 2

where Marty McFly gets a glimpse
of his future SELF
The Big Bang Theory Season 12, Episode 10

My mother always said,
"To thine own SELF be true."
The Big Bang Theory Season 6, Episode 6