Debating on ReBuying The PlayStation Portal

So I’m a NCAA Athletic Videographer, I travel on the road alot with sport teams via Bus or Plane (mainly bus). 2-3 months ago, I bought the PlayStation Portal and I returned it after 2 days because my connection was horrible at home.

Yesterday, I upgraded to Xfinity Wifi with 1,000 Mbps, unlimited data and have a Lan Cable connected to my PS5. My speed has been exceptionally better and I was thinking now would be an appropriate time to acquire one.

My questions are

How well is it with public WiFi?

How well is it on mobile Hotspot?

How can I improve my quality of play if I’m on a bus for 8+ hours?