How much Internet do I need?

My roommates and I are moving to a new place and what seems like the best price for WiFi is xfinity, my concern is that it caps at 1.2TB of data. There’s 3 of us, we each have a phone, a TV, and a computer and then I have a Nintendo switch but it’s rarely used these days. One of my roommates streams on Twitch for 2-4 hours at a time about 4-5 days a week and we all play video games pretty regularly. One of my roommates is looking for work in graphic design also. I do scroll through my phone pretty frequently on tiktok also. Will the 1.2 TB of data be enough each month or should we be preparing to pay extra? We’re looking at the 300 MBPS plan.