Do your home work on which Carrier you want to work for, What freight lanes you want to work in.
Intermodal can be very easy work, that said. You got to remember equipment is 25+ years old that you'll be pulling down the road. Your biggest experience will be your truck maintenance, Most drive go broke or so far in debit, be for any money is made, because they don't have business plan in place.
Call them and ask. I had experience. Doing crude oil and oil water. Imo I think you need training. I don't know where the pay is now. Dry van pays good now, but it always increases and then drops slowly and then bottoms out.