Hi antitian,
I moved your post to the Computers and technology board.
I presume you'll be using a tracker — PokerTracker 4, Hold'em Manager or Hand2Note (see https://www.pokerstrategy.com/poker-software-tools/ — there may be discounts if you purchase them through PokerStrategy.com).
If you are, then the database uses considerable disk and CPU at times. I have an additional internal SSD for the databases, and it seems to speed things up somewhat. Not necessary, really, but if not, get a big enough SSD, and realize that the OS and tracker will be sharing it. Perhaps even let the tracker use the spinning-disk drive.
You don't say where you live, so I don't have a way to assess your budget. If your budget is in CAD, then I have an idea of what might fit.
I've gone through this exercise a few times in the last several months.
This does not include a curved monitor, but otherwise it is close.
It also doesn't include keyboard or mouse.

You can save some bucks by purchasing a used graphics card, or used case — even a used computer will yield a serviceable case.
Some notes:
An SSD for your primary drive is essential — spinning metal disks are just two slow
I consider 16GB RAM is minimum. If you're going to run a solver, then the sky's the limit.
If you'll be streaming, the graphics card is a must — on my current rig, the on-board graphics just couldn't cut it. If not, the on-board will likely do.
Make sure you know what HD you'll be getting, and make sure you get a mobo with the right slots to match it. Same goes for graphics card.
The list doesn't include stuff like camera, headset/mic/speakers
I included a 4TB second hard drive. I also suggest an even larger external, and some decent backup software — and use it!
I listed W 11 pro — I have no experience with W 11 though. I just know that I have never liked "home" editions — possibly since I was the IT guy at work and we had either pro or enterprise editions and there was so many more diagnostic features available on those.
Have you built a computer before?
The one I'm using now is the first one I didn't build — it was actually cheaper ready-made, and if you can find the specs you want for case, mobo and CPU it might be cheaper for you as well. Jus' sayin'
The side benefit is that if something goes uʍop ǝpısdn when they build it, they fix it, but if you fry your motherboard ...
Let us know what you decide ...
Cheers,
VS