Riding is not particularly difficult to learn. Most people can become safe riders. Having said that, there are a few who should never go near a motorcycle due to their temperment or lack of physical co-ordination. Riding is both an intellectual and a physical skill, and the ability to learn ideas, supports the development of the physical skills needed.
You should sign up for the MSF basic riding course before getting serious about buying a bike of any kind. Even though it is not difficult, there are a lot of basics to learn about riding, and the course will take you through all of it. If you can complete the course OK, then go ahead and look into buying your first motorcycle.
2004 Rebel 250, 2003 BMW K1200GT (roadburner), 2004 BMW R1200GS(all purpose),
1973 Norton Interstate (in a box in the basement)
1968 Triumph Bonneville