I’m in data engineering and that market is dominated by Microsoft. Understanding an os is essential if you’re, say, a sysadmin.

I’d recommend looking into some certifications. Some businesses are very sensitive to those.

I have a 2 out, 4 in usb hub with a button to switch. I press a button and my mouse, keyboard, webcam are available on my other system. I can not use them simultaneously though.

Read up on Intel QSV. You essentially only need a recent cpu. i3 would do.

I hear good things about the Intel Arc A380. You basically only need it to convert video and the Intel is not too bad at that for not too steep a price