I'd also think you'd want to consider if this is even a wise thing to do. Since you say you have no knowledge of computer parts, how do you know it's even wise to spent the large heap of money to upgrade to the I9 in the first place?
You have no computer knowledge. The first bit you need to know is that motherboards have a range of CPUs they support. This can vary widely, due to a lot of factors. So your first order of business should be to check the documentation for your model of Cyberpower computer to see what range of CPUs are supported. An i9 might not even be on the list.
You do it with an X299 motherboard. If you already have that kind of motherboard you can do it. Just simply swap the CPU you have with the new one. You'll need to apply thermal compound as well on the new cpu. If you have an i7 7820x for example you can do the upgrade just like I said. If not then you'll need an X299 motherboard.