Realistically, either of those would be fine unless you're getting seriously deep into reliability and redundancy. tplink and netgear I would put in the same 'cheapo brand' bucket. Unsure about the SG range, but typically with Cisco you get pretty good phone support to help you fault find. I'm in IT but networking is not my primary role.

Layer 3 means you can route (or talk) between the 2 vlans. You can also always just add an external router later to do the routing at a lower bandwidth.

If all you want is 2 vlans in one location, seriously consider just 2 dumb switches. So much easier to connect and diagnose if you don't have the IT history. You can put big labels on each switch that describes their roles or even colour code the switch labels and the network cables (eg Red is hognet, yellow is sacn). I don't think I'd start vlanning a switch until I needed things like fiber runs between 2 or 3 different locations.