Forgive me for the late answer zombunny2, unlike what you said I think the security you put on your windows machine is completely fine and legitimate. Better be safe than sorry, as windows is the prime target of hackers.
As for myself, on my Windows I decided to go for Immunet + Avast/Kaspersky (in turn one month each) At first I wanted to go for Bitdefender but it's trying to force the uninstallation of Ummunet with no-compromise. I thought of installing Bitdefender first then exclude Immunet if it's possible, but I was a bit against it after some research as many people seems to say that there is an incompatibility from Bitdefender side, so maybe for later.
For a firewall, I'm going to try both Comodo firewall (best available now but have some bad points concerning pop-ups & adware) and Tinywall (currently using).
As for the finishing touch, ProtonVPN, 9Quad dns, Brave browser with extensions such as Brave shield, Duckduckgo Privacy Essentials, uBlock origin, and I'm considering some in-demand scanning software for malwares and spywares like HitmanPro.
I think that's what you can call overdoing, but I personally think it's alright. We only need to go through this once and you can rest easy with a peace of mind afterward. Also learning new stuff is fun and useful.