Complete Noob Looking for Input on First NAS Build

Hey folks. I'm a complete noob at networking (and reddit) and looking to build a NAS to replace my current Synology 224+. Here are the parts I'm looking at getting https://pcpartpicker.com/user/abokittens/saved/pMqgQ7 .

My use cases are your typical casual needs (file storage, movie/music streaming) and at some point I'd like to be able to torrent onto it, if that matters. My short research has led me to conclude that 1) I don't need ECC, 2) I'll be using TrueNAS (Scale?) with RaidZ2, and 3) since I don't tend to stream 4k I should be able to rely on the iGPU and Plex. I had also considered SAS drives based on a few youtube videos stating the decreased initial cost, but the PCPartPicker compatibility filter seems to not be designed to check for HBA card and motherboard compatibility (also the ECC compatibility with my CPU might also be incorrect?). If getting used SAS drives is a recommendation I'm definitely open to it. With the amount of storage in the build so far, I don't anticipate needing to replace drives for quite some time.

I'd appreciate any advice, pointers, etc on this. Thanks!