.....When I saw the first picture I thought it was a biological female...so there's that!

I know I'm not MTF so I don't know too much about passing, or everything that you ladies have to go through to pass...But dysphoria to this point has come in waves so I have a little experience on presenting feminine.
I do agree that a wig or continuing to grow your hair will help. If you don't like having long(er) hair (which even when I have presented feminine I cannot stand) just get a more feminine short cut....Asymmetrical bobs, lots of layers, highlights....that kind of girly stuff.
As for padding....I would say avoid going like drag queen extreme, especially considering how slender you are....
They make women's shape wear naturally sized fake butts in them...And "chicken cutlets" could probably work for a natural-ish looking chest padding. (You can even get the ones that stick to your chest if you don't feel like wearing a bra....(Bras really suck.)
If you're feeling really froggy you could invest in a waist trainer or a corset to cinch your waist for a more hour glass figure.
Welcome and happy passing!