Alternatively:

AVR ($400): https://www.accessories4less.com/make-a-store/item/denavrs760h/denon-avr-s760h-7.2-ch-x-75w-8k-a/v-receiver/1.html

L/R Speakers ($300): https://www.crutchfield.com/S-TclK9Rv8wKm/p_991Q150B/KEF-Q150-Black.html

Center Speaker ($200): https://www.accessories4less.com/make-a-store/item/kefq150blkea/kef-q150-5.25-2-way-bookshelf-speaker-black-one-single-speaker/1.html

Subwoofer ($400): https://www.svsound.com/products/pb-1000-outlet-1

Surrounds ($110): https://www.amazon.com/BS5-Passive-Bookshelf-Speakers-Tweeter/dp/B07YZDS9LF/

Alternative surround options:

Flatter on-wall option: https://www.crutchfield.com/S-VlualMiklMh/p_107OWM3B/Polk-Audio-OWM3-Black.html

Dirt cheap, compact (and kinda crappy) option: https://www.amazon.com/Micca-COVO-S-Compact-Bookshelf-Speakers/dp/B00N8265I8/

Whatever you do go with discrete audio components. You could go with a Home Theater in a Box set like this Yamaha YHT-5950U. Or start with a 3.1 setup and add rear speakers later as budget allows.

• Check your local Costco for the Denon AVR-S760H (has been on sale in store lately as low as $250) or the Yamaha RX-V385 would be a (significant) step down option. Even at Costco's regular in-store price of $350 the Denon is likely worth the extra if you can swing it thanks to its HDMI 2.1 support and 7.2 channel amplification.
• A center channel like the NEUMI CS5.
• Front surrounds like the NEUMI BS5.
• Monoprice subwoofer for some kick.

Later add rear speakers as budget allows. A second set of NEUMI BS5 or a set of Micca MB42X would round out the setup nicely. If you get the Denon S760H you could also add a small set of front Atmos height speakers like the Micca COVO-S for a 5.1.2 setup.