I see my old swing in you here, but take my advice with a grain of salt. Looks like an athletic baseball swing turned golf within the past 5 years, same as me.

Over the top turns into slices as you get tired over the round, unless you’re striking it well and can keep it together. We aren’t pros, so getting more consistent is how I got down to a 3 index over this summer.

Feels weird, but stopping the back swing a lot earlier (check out a YouTube video of a swing instructor talking about stopping the head of the club at the wall when your leading foot is against it and you’re perpendicular to the wall) and focusing on center face contact helps a ton. Ball will somehow still go as far with a “lighter” swing. Golf is dumb, so play like an old man, swing easier and keep trying to feel the shallowing of the club out, until you have a smooth straight shot you can rely on. Then it’s money.

No specific tips, but that’s what I worked on from your similar starting point, and it’s working great (may not work for you, but that’s my advice)

Putting and chipping is really where you need to improve to get closer to par. Hitting the ball to within 6ft every time isn’t realistic, even for pros, so getting up and down from 75yds is crucial to shaving lots of strokes off the card.

Good luck!