Late 2013 MBP sequoia - Looking for Tips and Guidance.

Hey!

So I decided to jump from big sur to sequoia. The main reason is that I have an ipad mini and I want to be able to see my handwritten notes and also the latest note features. My notes say unsupported.

I made the upgrade I ran into a bunch of hiccups where the kernel_Task and MTL would use like 80% of CPU. I would reboot and patch a few times and things now work smoother. I also opened up the PC and put some new thermal paste and cleaned out my fans. I am not sure how well it has helped the PC but both were in rough condition.

My concerns/ Issues:
- Is there is anyway to make the computer snappier? ( Or is the the cost of the OS)
- Is there anyway I can speed up start up?
- Any settings or things I can change to really
- Anyway around being able to see hand drawn notes on lower OS?

THANK YOU!