Be embarrassingly specific in prayer. I’ll say the actual thing, like ‘I lied to my coworker about the report,’ and then go back and fix the lie. That’s the awkward part, still hate doing it.
Repenting is turning around. You admit to God what you did and then change direction, and 1 John 1:9 says he’s faithful to forgive when we confess.
I used to think I had to feel awful for long enough before it counted but that’s not in the Bible (like this one).