If it can be done, I would appreciate any help in doing it.
Sorry, it can't be done.
The fee is the difference between the input(s)' and output(s)' amount, not exactly indicated in the transaction.
So to edit the fee, you would need to change the output's amount which will invalidate the signature.
It's possible only for unsigned raw transaction.
BTW, mempool isn't too bad right now and 6sat/vB wont be dropped from nodes with the default settings.
Try re-broadcasting it and then perform CPFP (
Child-Pays-For-Parent) to bump the overall fee rate.