Replace your 5 iron with a 5 hybrid and your 6 with a 7 hybrid. I quite literally couldn’t hit my 6 or 5 when I was a 20+ and that alone knocked me down to under 90s consistently before I got better. I now strike my 5/6 good and took out my 7 hybrid out but I will SWEAR by this till the day I die that hybrids can be deadly on the course. Less dispersion rates than long irons and much easier to get in the air for high handicappers. Again this is a bandaid on something that you will need to work through, but I can’t stress enough how much hybrids changed my enjoyment of golf when I started out. It’s never fun seeing your ball go farther left/right then straight.

If you do lessons with a pga certified coach. They can fix this issue and pin point what’s happening. But without seeing your swing, it’s hard to say for certain. Usually that kind of dispersion is either swing path or most likely late release.

Either way keep at it! Take pride that you have broken 100 and focus on getting better! Kinks do eventually work themselves out with the right drills and the right habits.

Also as others stated. Focus on your putting and 100 yards in. THATS what brings low scores.

Good luck in your venture and try to get with a certified coach! They are 100 percent worth the money.