The current plan is to get a new laptop get everything working there then upgrade old one.
Which windows should I get the new one with? 11 12? whats the freshest and best now?
Considering security, you should always use the latest version
That is windows 11
Actually, on Windows nowadays, "updating to latest version for security" hardly applies anymore, because the way the Windows architecture has been refactored, no major overhauls are done between major versions anymore. Also all the supported Windows versions (I am thinking mainly about 10 right now) get the latest security updates.