I spent over a year working from home out in the sticks before retiring, using Verizon cellular data.
Depending on the structure you might consider a cellular booster/repeater. I got ours from the RepeaterStore.
Living under a tin roof, getting a signal good enough for data is a challenge. The repeater has an external antenna you direct towards the closest cell tower (for your particular service) and then there is a antenna inside the structure that transmits a boosted cell signal to your phone.
You then run your internet on the phone's hotspot.
We've now moved into our barndominium and it's like a huge Faraday cage. The repeater is absolutely necessary to use a phone.
I live in the middle of a huge forest, we have fiber to the house but during a days long power failure I used my phone’s hotspot for internet... it wasn’t very fast but I managed to keep browsing the web and watching my shows at 480p.
The funny part is I’m in a valley and the cell does not reach me here, especially with the metal roof so I used a 40ft fiberglass pushup pole (ham radio stuff) and actually duck taped my phone to the top and used the hotspot... goofy but it worked.. if you are older, like me you will understand that I laughed a bit as it reminded me of the old sitcom “Green Acres” where their phone was at the top of a pole :-)