helpmeimshort

hi!! so basically im 150cm short and fat (idk if that plays a part) and i rlly want to learn how to ride a bike ive been bugging my mom just to get a license but everyone is generally worried about how i wont be able to even get onto the bike. ive heard about how there are shorter bikes available at the centres but im still worried that i still wont be able to get on should i still try?? im a very very shy person and reading the stories of people falling off the bike n shit rlly discourages me bc i easily get paiseh side note : i can ride a bicycle so mayb idk i