Good luck and fun with the games. EU4 is my fav of all the paradox games with HoI a close second. If you need any Tipps at any time sent me a pm.
If you want excellent guides on a few mechanics in eu4 check out remans paradox on YouTube. He has not been active for a while but the guides on trade, military and such are still valid.
I've seen it manny a times when I form THE EMPIRE with Britain in HoI4, it required the short lived dominion of North America to make all of the USA and Canada a British core. Conquer the US and hand it to Canada, perfection.
Believe me, we don't want Orban either..
I get what you are saying, but the UK joined the EU with FPTP voting and left the EU because of FPTP. So while I agree that exposure might change things I do doubt it.
Gotta spread the tale:
https://www.hplovecraft.com/writings/texts/fiction/cc.aspx