I am thinking about making my own router using OPNsense instead of buying one for my home.

Basically I game (a LOT) and stream so I just need something stable and reliable. I have experience building PCs but I've never built my own router before so all of this is completely new to me.

Right now I'm looking into getting a Protectli vault and putting OPNsense on it and then getting a tp link access point to connect the wireless devices in my home.

I saw a lot of people use switches with their firewall hardware, but in my house only 1 device (my pc) gets connected via ethernet. So, is a switch necessary for me? Could I just connect my pc into the Protectli and then also connect the tp link AP for all my other devices?

Additional info:

My internet plan is 800 mbps DL / 20 mbps UL from xfinity.

My modem is Arris s33 v2 modem.

Which would be the cheapest Protectli that would work for my situation? Product Comparison - Protectli Firewalls at a glance (How do I know what connection speeds each device is capable of? And do I need to purchase anything else to use them with besides a USB flash drive? Like storage or anything?)

And for the wifi AP, I was thinking of this one TL-WA1201 | AC1200 Wireless Access Point | TP-Link (It says it's capable of 800 mbps at 5ghz and 300 mbps at 2.4ghz which would honestly be enough for the wireless devices my house)

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Any suggestions or resources are welcome! Please and thank you!