If the $750 spend excludes the operating system and peripherals:
PCPartPicker Part List
I threw in the above case as it's one of 2 cases i've tried under the $50 mark. Acrylic window.
There are supposedly better and a bunch of other under-$50 newer case options 'with tempered glass side panels' available. I haven't tried these myself so it would be a good idea to look to independent reviews/customer feedback. Eg. https://pcpartpicker.com/products/case/#t=7,6&sort=price&B=3,4&X=0,5072
If you're willing to go a little over $750: https://pcpartpicker.com/product/Cjyqqs/darkflash-dlm-21-microatx-mid-tower-case-dlm-21-white
Is it capable for 1440p gaming?
lighter games at normal-high settings with the intent of 60-ish fps, yes.
Any other suggestions?
It's certainly capable, but for 1440p gaming i'd look to secure a little more power on the GPU side of things.
Keep in mind, to secure a 2060 graphics cards, one of the items trimmed was storage. 500GB is sufficient for the operating system, applications and a few gaming titles. You can always add more storage later. You may also desire an aftermarket cooler to uncap some of that CPU boost-potential - again something you can invest in later.
Looks good. Ryzen 2600 and rtx 2060 that i also think. Can i ask? That graphic card can oc?
There is the ultra version for $20 more as well.
Yes it can be overclocked with potentially a nice return in performance. https://www.techpowerup.com/review/evga-geforce-rtx-2060-ko/33.html
What is your country so we can use the right currency? (USA, Canada, etc)
Any other Peripherals required? (Monitor, Keyboard, Mouse, Headset, Speakers, etc)
Is an Operating System needed (Windows 10)?
Just for build rig. Other peripheral and OS not required