Bruh you can get one for like $5.
https://www.amazon.com/AmazonBasics-3-Button-Wired-Computer-1-Pack/dp/B005EJH6RW
And you can get a name brand gaming mouse for under $20.
https://www.amazon.com/Razer-DeathAdder-Essential-Gaming-Mouse/dp/B094PS5RZQ
And I'm sure you could find someone giving some old mice away for free on Marketplace or something.
Anything that comes from anyone other than the hardware manufacturer should be considered suspicious. I do not know about drivereasy.com, but I would only ever go to nvidia.com to get drivers for an NVIDIA graphics card. (Note that you might have an Intel or AMD graphics card. If so, you would go to Intel, AMD, or your computer/motherboard manufacturer's website.)
Nothing you install on your computer will "upgrade the graphics card". You can update the driver, which may fix some errors, but will typically not allow a game like Teardown to run (unless you simply did not have the driver installed at all before).
Do you know what graphics card you have? That is a good place to start.
When you say that you cannot play the game, do you mean that you get an error when you try to start the game, or it starts, but just runs extremely slowly? Does your computer crash when you try to run it?
Other than Teardown, what other game do you run that would need a good graphics card or computer setup?
Follow this (https://www.userbenchmark.com/Software) to get a guide on how to see the specs of your PC and how it's running. If your system is older than the minimum system requirements that will be why. But it's most likely that you don't have a graphics card as the game won't work with integrated graphics and even if your gpu was a bit out of date it should still load just run badly.
Maps are made in MagicaVoxel (which is 100 percent free) - https://ephtracy.github.io
There will be an option to import them into the game and play them but there is no official sharing as of right now according to the devs, but they want to implement workshop eventually. The best way to share maps when the game comes out is probably posting the map file on here or the Discord.
Happy to have you apart of the community!