Awesome, it's great that you're 1. discovering yourself, 2. planning the next steps and also 3. seek community! You have our support β€οΈ
I personally feel a bit uncomfortable framing transgenderness as a medical condition that needs to be diagnosed, though I get it on a technical level.
I'm not sure what to make of your "English please. π". Maybe people can link you stuff that's in another language, if you prefer that.
You'll hopefully have a lot of fun exploring girly things! Don't feel pressured to have to enjoy everything, or to be good at everything right from the start, or to educate yourself for hours before giving things a try.
Regular nail polish shouldn't be to hard to try, but make sure to also get nail polish cleaner/remover. Personally, I noticed my intuition betrayed me, regarding which colors I like.
UV polish is slightly more involved. It gets harder & thus more durable than regular. You can try that out without getting a UV lamp if you simply do it on a sunny day and go outside / to an open window. You might need a base and top coast, so look that up if you wanna try UV.
It's a big plus if you can try on stuff without having to commit by buying it, like if you have a friend that let's you try out their nail polish or clothes. Thrift shops / clothing swap events are good to, so you don't spend much money before figuring out what you like.
I'd love to hear/see updates, whenever you're comfortable sharing! π§‘