Focus on your other body parts! I, for example, pass pretty well, except for my chest. But because I look very masculine in general (well except for one thing) people still always assume I'm a guy. In summer I would recommend loose shorts (cloth ones are the most comfortable in my opinion), in winter I'd recommend cargo pants. Go for a more masculine hairstyle (masculine doesn't necessarily mean short), let your body hair grow out, use men's deodorant and do some voice training