@EugW awesome thank you for all your help! Another question separate to macOS you might be able to help with..
Upon startup, sleep, and loading the "storage" tab in About My Mac, my laptop makes a noise as if it's whirring away underneath the trackpad for a few seconds. If this makes any sense it sounds like: vrr, vrr vrr vrr vrr, vrr vrr vrr vrr, vrr vrr vrr vrr, vrr.
It sounds possibly like the mechanical hard drive but it didn't do it when I bought it and suddenly adopted it one day? It's a short Vrr sound, followed by 3 longer, finished with another short? Sorry if that makes NO sense lol!