What is the maximum amount of hours you can spend on the road?
I have some family friends in the trucking industry, but never hear about how long they can stay out on the road. Is there a law that regulates how long you can be out there?
If you only drive within a state then state regulations will apply and those will vary by state.
I would carefully research this career and talk to many actual drivers. https://www.cnbc.com/2022/07/05/why-driving-big-rig-trucks-isnt-a-job-americans-want-to-do-anymore.html has an interesting article that says median annual pay for big-rig drivers in 2021, per BLS, was $48,310 or about $23 an hour. However many of them work 60-70 hours a week and so that makes it $13-15/hr.