Heya, there! ヾ(•ω•`)o I know coming out can be quite the fright, but there's one *major* thing that *anybody* planning to come out should follow:
-Always hope for the best, but prepare for the worst.
By that, I mean you should always be hoping for the best outcome, no matter what, just to stay calmer and have more control over the situation. However, you should *also* prepare for the worst. To do this, get in contact with a supportive friend and ask if you can stay over at their house, just in case things go awry. Make a whole back-up plan like that, all right? Have this back-up plan fully fleshed out before coming out, just so you know what's going to happen if things *do* go South. Pack some bags and hide them somewhere in your room beforehand, too, just in case. Here's a site that tells you about things you should be packing:
https://www.themix.org.uk/housing/housing-problems/what-to-pack-before-you-leave-home-8043.html
Now, as for *how* you should come out, I gave this same advice to somebody else, and so I'll give you a copy-paste of it:
"I must admit, finding the best way to come out is always going be a struggle, unfortunately. However, if I may, I highly suggest finding your strengths before coming out (your talents; the things you're good at in life). For example, one of my greatest strengths is my skill regarding writing and ability to put emotion into words. With that, I was able to form that coming out letter, all by myself (however, I did have *substantial* help from my best friend. That being said, never be afraid to ask a close, supportive friend for advice and support regarding coming out!). After you assess your strengths, go online and conduct some research on ways you can come out. Get creative, if you're good at art. Form a deep and meaningful letter, if you're good with writing. Bake an LGBTQ+ cake, if you're good at baking. And, most importantly, have fun with what you're doing! Be proud of whatever way you decide to come out, and just put yourself in your parents' shoes. Look at what you're doing to come out, and ask yourself:
"Does this get my point across?"
"Does this explain everything in a way my parents will understand?"
"If I were my parents, how would I react to this exact thing?"
And other such things.
Hope that helps, and best of luck, friend! ヾ(≧▽≦*)o"
Here's a link to my own coming-out letter, and where I commented that:
imgflip.com/i/5xyz6p