I will add that currently, on my more than ten year old laptop with an i5 processor, Task Manager is utilising 1.1% to a max of 2% of processing power.
If funds aren’t too tight, replace it. I paid 3k for the Dell Latitude that I’m using.
Of course you can continue to tinker with the one you have, but as you can see, the CPU is very poor. SSD are cheap enough, so you can swap out the current SSD to play around with Linux(Mint and Ubuntu are mainstream, but there are other possibly suitable options) or simply Dual boot on the current SSD.