Your usage sounds light enough that you won’t notice any performance difference.

The processor isn’t the only thing to consider, though. The M2 has a brighter screen, better webcam, and MagSafe charging which can free up an extra port for accessories. I personally feel that those features are worth the price difference.

You need a hub/dock that supports Thunderbolt.

Here’s one from OWC if you want to stick with them: https://www.owc.com/solutions/thunderbolt-hub

I still have 2 Months warranty but if IceTea or whatever got spilled on the keyboard apple wont fix it for me unless i pay for it ( so no warranty will apply i guess).

Bring it to Apple and have them take a look?

If the key is sticky because of a spill, then you’re right that it won’t be covered under warranty. But you don’t know if that’s what happened.

macOS comes with built-in antivirus protection:

https://eclecticlight.co/2022/11/01/everything-you-need-to-know-about-xprotects-malware-protection/

Yes, but note that you’ll probably need to install extra software to get the scroll/buttons working the way you want. Logitech’s software is garbage, but there are third-party options like Steermouse.

That other port is for Thunderbolt 2:

https://support.apple.com/kb/sp714?locale=en_US

Search for “Thunderbolt 2 to HDMI adapter” for options. Here’s one:

https://www.amazon.com/Plugable-DisplayPort-Supports-displays-3840x2160/dp/B00S0BWR2K

There is no way to tell without having the MacBook in your possession and poking around.

Can you post screenshots of the CPU and Memory tabs in Activity Monitor? And also let us know how much free space you have left on your disk?