Is there a height/weight requirements for trucking?

a hazmat endorsement is so that your company can assign freight to you that require signage (placards) on the vehicle, for things like, flammable, gases, explosives, and such.

with out that endorsement, you cannot haul that stuff (and others) and you may have to sit, until they have a different type of load for you.

 

No. If you can operate the truck and put up with the hassles of trucking you can EASILY find a job.

You are tall enough, if that is your major concern. There are many drivers that are normal size like you and me. You don't have to be some genetic freak like those people above 5' 2".