Starting out with a cheap used monorail like a Cambo/Calumet is a good way to go. A monorail is straight forward and easy to learn movements on. They are awkward to backpack with but some people do it.
If you later decide you want a press or field camera you can always sell the monorail for close to what you paid for it. Monorails do make great portrait and still life cameras and can compliment a press or field.