Hey Noiro I have a very important detail for you in addition to agreeing with most of the above.
Ok, you are worried about the voice, the appearances and the mannerisms and all of the usual stuff that cis women 'get for free'.
What is it you expect to get if you had all of that though?
The reason I ask, is, because I have the same self doubts, but we all do, but more importantly, my sister (who I have mentioned before) she's oh so female alright, she is A. blonde (and all the stupid stigma that came with it) and B. drop dead gorgeous (I have SEEN guys drool looking at her when she was young, actually drool, it is not impossible eh).
My sister, she could be said to have it all. She great looking, in great health and she is a VERY smart woman. What she doesn't know about insurance is not worth knowing. She's worked in this line of work for decades. She's almost 50 and nope, no Mr Right even though she's meant plenty of Mr Wrongs and Mr Didn't-work-outs.
You don't get anything magical with a great female body.
You are approaching 20, hell your life hasn't even begun and you are thinking of discarding it?
Here is another truth a lot of us have to come to grips with in time. Time, it makes all of us eventually old wrinkled less than ideal looking

I can assure you you look just fine.
I can also assure you you don't really know what you would look like as a female as most of us simply have no real skill at it without practice.
But I have seen before and after images of friends that went from male to female, and it is rather shocking actually.
They don't even look remotely like the same person when they actually put some effort into the process.
And it WILL take effort. None of this is going to be easy. Yer 20, I bet you thought high school was long and hard

Hah a few measly years

It will likely take me 4 years just to unscrew up my wardrobe.
I'm not even going to waste time on my voice. Hey I don't think it is that important. I like to listen to my songs on my mp3 player while out walking and I mouth the words as if it is me singing, but nope, I will never sound like Celine Dion even when she has a bad cold hehe.
I have a neck size that is totally hell on my looks. Likely will never solve that. I'm at least short for cliche though. I'm condemned to wear a wig, but I recently found out how dramatically better I can look with one on. You never know till you try some things.
I found out I look like granny in a night gown. Old overweight and not sexy

Some things are just not going to cooperate

It's sad we can never experience menstrual cycles, and I can assure you cis females would thing our being sad about it makes us insane

I know what it feels like to have trouble crying, you have simply focused on the grief too long. I know first hand about that.
You need to let it go. And no it won't be easy, it isn't for me.
There are people here though that can get you through all of this stuff that is bugging you.
You WANT the rest of your life eh.
There is something you can do that's easy too.
Find a coffee shop, and watch all the females coming and going. Now be harsh, and give them all ratings of 1 through 10 for attractiveness. You will be surprised, that when you really acknowledge it, most women will hate how they look too. Most cis females are no happier with their bodies than any of us are.