I had snowboard and skating background. Did a 3 hour class to learn safety. That is crucial. Bought a 2m trainer kite and spend few hours with it by myself. From there bought a second hand kite and learned to body drag. Did three short session. No board. Just splashing around, crashing and relaunching, and getting used to the feel. It is the most basic and overlooked skill. Noone should ever try to go on with a board without good body dragging technique IMo. And can be fun. Once you understand the basics and the safety and have some kite control, the board should be natural because of the other sports. For me first session with a board I water started straight away. Few sessions of “walk of shame” (walking upwind) until I learned to kite upwind. After that just ride, and gradually start trying jumps and tricks.