I am not aware as to whether you can get a commercial loan through VA. If it is possible, compare their program to a SBA loan. There is a bunch of paperwork involved with a SBA loan, but the rates will be more favorable. Keep in mind as well that if you are coming in as a inexperienced driver ect, getting a first conventional commercial loan might be more difficult and require higher down payments and interest rates. There are some deals out there but you have to do some shopping to find the deals.
Also consider a lease purchase from a owner. The terms on that would be negotiated between you and the owner. (primarily for used trucks)
We have not done any commercial or truck financing in a long time. Hopefully some of the other folks might be able to give you their advise or experience.