Do not buy until you understand.
No doubt, you will get many suggestions here.
It is not hard to assemble a pc, but if Microcenter will assemble your parts and install windows, that is what you probably should do. Their walk in prices are excellent.
The most important component for a gaming system will be the graphics card.
You can get a relative ranking of capabilities from tom's GPU hierarchy list:
https://www.tomshardware.com/reviews/gpu-hierarchy,4388.html
If you are using a TV, your refresh rate will be limited to 60hx via HDMI.
LG CX OLED will do 120 with a 3000 series gpu.
That suggests to me to not go overboard on graphics. Your original GTX1660 would be a reasonable pick.
If you ever need more, a graphics card upgrade is about the easiest thing to do.
Also, the value of the original ryzen 5700G is that it includes a good integrated graphics capability.
Suitable for Home theater work, but not for fast action gaming.
A lower priced i5-11600K would perform similarly.
Looking at what is available in the Chicago store I might pick a cpu/mobo bundle of a i5-11600k and a asrock Z590 matx motherboard for $380:
https://www.microcenter.com/product...00k,-asrock-z590m-pro4,-cpu-motherboard-combo
If a lower priced I5-11400 or i5-11400F were available, I would pick that.
FWIW, the F versions do not include integrated graphics and are usually a bit cheaper.
Unless the price difference is major, I would pick a non F version.
If you ever have a graphics issue, you can still run all but gaming.
You will want an aftermarket cooler. A simple tower type cooler with a 120mm fan will do the job quietly.
Noctua makes good and quiet ones, but microcenter seems to charge a bunch for them.
I would pick a NH-U12s:
https://www.microcenter.com/product/617831/noctua-nh-u12s-cpu-cooler
Seasonic focus 750w is outstanding. It can handle any future gpu upgrade.
It will only use the wattage demanded of it, regardless of the max capability.
Samsung ssd's are arguably the best for reliability and performance. Do not go cheap there.
1tb is good.
The V100 case you picked will work.
But, I think I would look at the cm N200 MATX case. for $65.
https://www.microcenter.com/product/414482/cooler-master-n200-matx-mini-tower-computer-case-black
Ventilation is better.
It is more compact and included a dvd bay.
ASUS DVD is fine.
You will want windows 10 64 bit installed. Home is OK.
There is very little in the PRO versions that a home user would want.
Perhaps the ability to defer forced windows upgrades for a year.
There will be an OEM version offered for less than the retail version.
OEM is valid only for use on the initial motherboard.
Retail gets you Microsoft support which you may want.
OEM and you will depend on these forums for support.
In addition, if you ever change motherboards, you would need a new os.
If you trust the techs at microcenter, print out this post and ask them about it.
Some just want to make a sale, and others will be truly interested in what you want.