Hi,
You've done a lot! And drum brakes can be a pain. LOL, you get used to them.
As far as the parking brake, it sounds like the system works, but the lever will need to be replaced. Were you able to try using something like WD40 on it to see if that helps?
As far as adjustment, the two pics below are the directions. Based on what you have already done, I feel confident you won't have trouble.
Let me know if this helps or if there is anything I can do to help.
Take care and I hope you had a nice Thanksgiving.
Joe
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Thursday, November 25th, 2021 AT 6:16 PM