Welcome!

Easiest or best? Best–install keystones and a proper jack. Easiest–put an outlet cover over it and screw it into the sheetrock (I’ve seen this done for holes in walls too)

One way to help you think about vlan segmentation is to think about how it would look if they were actual physically separate networks (which is essentially what a vlan is–a virtual lan). If it doesn’t make sense when you think of it this way, it won’t make sense as a vlan.

And also keep in mind that IP segmentation is possible on the same lan, which keeps things on different networks while on the same physical lan. This can work in effect like vlans as well.

In general, I disable ipv6 so it only grabs ipv4. I would try that. They may have enabled something that will not issue an ipv4 if an ipv6 is issued.

Possibly, but more than likely not. Easy test would be to connect two systems and run simultaneous speed tests on both. If each one maxes out, then yes, you can get more bandwidth this way.

You can always implement your own network–you don’t need Internet access for that. Most labs have limited connections to the Internet, especially when learning stuff like vlans, etc.

As far as how your apartment Internet would be different than your own isp, well, it’s all down to the IP address. If you get a public IP address (or more than one), you’ll be able to do everything you could with your isp. And in general, I’ve not seen an apartment that doesn’t do this.

If it is a ‘private’ IP subnet (192.168.x.x, 10.x.x.x, 172.16…), then your Internet incoming traffic will more than likely be behind a NAT so you won’t be able to have a server sitting behind this without some workarounds. But your regular Internet traffic like browsing, etc will work fine.

Hope this helps and feel free to ask questions as I dealt with this in one of our previous apartment complexes.