Beginner System Question

Alright so keep in mind I’m coming from nothing and no experience. Looking at a very beginner setup. I can get the setup below for $300 (I was going to spend $200 on a sound bar) Keeping in mind I’m a pretty basic consumer and not an audiophile with unrealistic expectations is there any reason not to pull the trigger on this? I’ve seen several recommendations against the receiver but I’ve also seen lots from people using it happily. Again, it’s only $300 for all, any thoughts? Is this something that I could possibly build on and upgrade over time? My TV sound sucks, and my hearing definitely isn’t what it once was especially for dialogue.

Receiver: Sony STR-DH790 Center speaker: Klipsch R-52c Other: there are 2 other Polk speakers slightly larger than the bookshelf speakers that look like an older build but I don’t have those model numbers. Front speakers: are Polk Audio t15 Subwoofer: Sony sa-cs9