I firmly believe that cosplay is for everyone. If you want to cosplay as a masculine character, go for it. Female? Just as okay to cosplay! But if you are going to do this, you must do it in a smart and safe manner. I'll try to touch a little on both crossplaying Male and Female characters, so hopefully this helps you in your quest to cosplay all of your hearts desires.
Female to Male:
Obviously I am most familiar with this method since I was born with a feminine physique. Please keep in mind that you must know the limits your body can handle, especially when it comes to binding. Your comfort is most important when it comes to cosplay and remember to stay hydrated as well. To make your face look more masculine, you'll need to use foundation on your lips, as well as using makeup to make your face look longer and more defined. It is super helpful to have an already androgynous face, but if you don't, and this advice kind of confuses you, you can check out this youtube video by theAlchemicfox: https://www.youtube.com/watch?v=9yEeUI1n8Ns
For binding, absolutely, 100% never, EVER use Ace bandages around your chest. Those are so bad and I can tell you from first hand experience that it messes up your ribs. There are so many resources for getting chest binders and they are so affordable now that you should spend the $10-15 to get. Please remember again, that you must know your limits when it comes to binding as you are compressing the breast tissue into your ribs, which can cause a lot of issues later. (Find em here: https://www.amazon.com/BaronHong-Binder-Corset-Tomboy-Lesbian/dp/B06Y6FZZT4/ref=sr_1_12?keywords=chest+binder&qid=1560712548&s=gateway&sr=8-12)
If you want to look more masculine when it comes to stance and posing, definitely stand in front of a mirror and work on standing as your more masculine character. If you can, have a male friend help you out. Spend time researching your character, and getting used to their poses. This goes the same for feminine characters, but changing so much about yourself to make the cosplay seem more authentic just goes the extra mile.
MALE TO FEMALE CROSSPLAY:
I am not as versed in this, but I will do my best. First thing's first. Tuck. And wear a dance belt. They are super inexpensive and keep the family jewels all tucked in so we don't horrify anyone. These are also suuuuper important if you are wearing a body suit (I.e. Spiderman, Deadpool, etc) You can buy your own here: https://www.amazon.com/Capezio-Full-seat-Dance-Brief-Medium/dp/B004G8PN3Q/ref=sr_1_3?keywords=dance+belt&qid=1560786458&s=gateway&sr=8-3
For fake breasts, there are silicone inserts for the bra. They are a bit more expensive but worth it to have for non-revealing cosplays. I know that there are some full torso silicone breasts that would be perfect for full cosplay, but these can run you a couple hundred dollars, so be aware and hopefully have more than one cosplay you want to crossplay for. You'll also want to make your face more feminine. My best advice is to watch drag videos because those queens can remove any idea of masculinity in their makeup skills. But if you aren't wanting to go amazing, over the top, you can follow this video tutorial: https://www.youtube.com/watch?v=fac9FGfpYvA
If you have any other questions or comments, you can comment below, or message me and I'd be more than happy to answer any questions. You can also check out this website (which I found on my search to find more Crossplay things to talk about) which has more awesome tips and tricks: http://www.cosplaytutorial.com/list/crossplay.php