HELP NEEDED! which monitor for aida

[MrLarnz]

for the last few weeks i've been trying to work out my best option to get a temp monitor into my pc, Was heading in the direction of them small 3.5inch or 5inch little display monitors, but noticed a few people saying why get that when you can get a (aoc usb 3 monitorAOC)

SO.... my question is, what would the process be if i bought a AOC USB 3 MONITOR?

obviously i need to purchase aida64 but then what?

the setup I'd love is attached, but I have no idea how I'd get this and to make it fit into the 16inch screen.

anyone able to guide me on how I'd do this?

thank you