Question How do I run old laptop faster?!

It’s going to be old considering they stopped making laptops 5 years ago and stopped making consumer models nearly 10 years ago. It won’t get W11 so will be EOL late this year
No doubt. But as you know, details matter.

Without information from the OP, not much can be offered beyond (maybe) more memory and (maybe) swap in SSD to replace HDD....Or, do nothing and save $$$ for a new, more capable system.
 
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Windows 10, 64 bit is running just fine. Can it harm my device if I forcefully try to install win 11?
The CPU is not Windows 11 compatible. It lacks the security features necessary. There are workarounds to bypass these requirements, but performance is going to be dismal. At a minimum, you would need to upgrade your memory and storage space.

This where the cost to do so questions whether to do so or not.