Go to a guitar shop and explain that you want to learn guitar so could they show you some starter packages, consisting of a guitar and amp (usually with a guitar bag, tuner etc as well). The most common would be squier (owned by fender, they're fender style guitars but lower quality), epiphone (owned by gibson, so gibson guitars done cheaply) and also yamaha. Try out the different guitars to see how they feel in your hands, how natural it feels to you etc.