i can get a high accuracy on alot of 2.6 star maps but the second i try and play 2.7 stars or more i get a really low accuracy or fail what should i do?

you should play more of the 2.6 get good accuracy and occasionally play
2.7 to push

keep playing harder maps, it doesn't matter if you get bad accuracy because you can just push your skills and improve by playing harder maps

doesnt matter at your level, just play anything you want for a while
it will matter shen you reach 4-5 stars, then you stay there until you can have tapping confidence (96-99% accuracy)

Improve your accuracy more and try more maps out there!

Trust me. If 2.6 vs 2.7 feels like a significant barrier, it is entirely mental. The difference is nearly indistinguishable. Just keep playing stuff a bit beyond your current limits, don't worry too much about the exact SR, just make sure it's a challenge but not impossible.