A L92 Master with Starter equipment - patient and courageous!
Alas, I wonder that you didn't find out yourself in 6 1/2 years.
I'd like to advise you to buy some top wedges, but that's obiously not your way to play.
For Starters, from memory with cobwebs:
- put the 3WD back in your bag - it's much better than the 3H.
(hmm - was it vice versa?)
- best club in your bag is the Starter putter.
- Use full backspin (dot down) most of the time - I did on drives, too.
- Expect less from rough or bunkers and shoot harder - you'll be less disappointed.
Thus, try to get back to the fairway the short way, and avoid chips&pitches from %% lies. Flops are a no-go!
Shot power below 70% is almost unplayable - avoid it, play longer and play back if necessary.
Shots going backwards are a speciality of Oakmont rough - you'll have to avoid those lies, otherwise swallow and accept. Next game is only a few minutes away.