Painfully slow mac
Hi, I hope someone can help. I stopped using my mac about a year ago because it became painfully slow. I decided to try and sort the problem. I have cleaned it up and cleared anything not needed, pretty much starting from new, but it still seems to take forever to open anything, took over 4 minutes for safari to open this morning and i get the coloured spinning wheel for every function i try and do. I have 1TB drive and have used 741.6gb of it. I no computer whizz and don't understand everything but i can follow instructions well, so if anybody has any solutions i'd be really really grateful. It just seems such a waste to have a imac and not be able to use it. It is all up to date with Monterey. Please can anyone help sort this out once and for all. Many thanks
iMac 21.5″, macOS 12.2