More ram will probably not help your laptop out with performance unless your running ram intensive programs if I were you consider upgrading your boot drive if things are running slow a 8 year old ssd/hdd probably isn’t doing so good
Also if you use a hdd you could defrag it
Windows often uses 8GB at idle for me with a single browser window open due to how much background BS it runs that is entirely irrelevant to anything I use the PC for. I upgraded to 32GB, then just finally decided to switch to Linux for good because it uses around 4-5GB with 10+ programs open (and most of that is Steam and Discord being inefficient).
Windows tends to use at least a quarter of system ram anyways
As long as you got enough storage for page fileing you should be aokay at least in my experience
Problem is multiple programs + web browser sucking ram.
Wirh 8GB I was continuesly red lining 95% utilization.
VoIP App, multiple tabs and windows of Chrome/Firefox/Edge (what the application is optimized for), Outlook, Teams, Spotify (to stay sane) and misc. other programs quickly suck up 8gb.