Need some help to learn to ride a bike

Hey guys so I live in Margao. I want to learn how to ride a gear bike. I already know how to ride a non geared bike and have been doing so for years. Problem is I don't know anyone who has a gear bike that they can lend me or anyone to teach me. Car driving schools exclusively teach cars. Is there any car driving school or someone who can teach me to ride geared bikes as well? I would really appreciate the help.