Ubiquiti unifi: pretty preformant while being dead simple to set up. No licensing fees but upfront price is steep. If you really get into networking you will find their hardware and software stack limiting especially if you need speeds greater than 25 gigabit.
Mikrotik: single handedly the best value out there. Their OSes can be confusing at times and you may need some CLI skills to do everything but it’s a good learning platform.
Opensense: highly flexible where you can tailor your experience to exactly what you need. If you are the type of person who wants all of the bells and whistle along with fine granulated controls this is your option.
Openwrt: a good choice if you already own a supported device but I personally wouldn’t go out and buy hardware for openwrt when opnsense is a better option.
Cisco: there are two types of people who buy Cisco, those who are obtaining their CCNA and those who have their CCNA.
tp-link omada: directly marketed as a ubiquiti unifi competitor but cheaper. Being a new line of products it’s not really time tested. I’ve heard very polarizing opinions on them so your milage may vary.
meraki: Cisco’s other brand. Sometimes you can get their hardware for free because they make all of their money off of the licensing fees.
You will get leagues better picture quality using a camlink/capture card and a camera with clean HDMI out. A gopro is a good budget option but a used DLSR or mirrorless camera is going to be the best. Some DSLR and mirrorless cameras support video out over usb so you don’t even need a capture card. Here’s a guide on getting it to work on Linux with a camera capability list inside the guide. If you do want to go the capture card route I hear elgato’s camlink works in Linux.