I think the most important thing is to start growing your hair if you havent already , most cis girls can look really nice with short hair but when it comes to us long hair is something like a boost to femininity, oh btw my hair are really curly and awkward but I Straighten them every time I take a shower , so there is a way eeer to make them co operate I guess...
also a nice thing to do is put a bit of make up to cover the beard shadow , doesnt make you look like a girl , but makes you look younger and kinda more feminine, sometimes I would use a bit of mascara too, also perfumes and deodorant for women,necklaces , bracelets ,,,, all these make some kind of difference ...
also pierce your ears , when I did it I felt awesome

and about weight, depends on your height I think average slim cis girls weight under 65 kg,usually 40-55 so at one point I was 62 and everyone kept saying that my weight is female and wtf eat something , and I wanted to scream to them "god i am female leave me alone "

Oh and btw dont worry about your parents , unless you show up in a dress they arent gonna notice...
And about the guilt , focus on the possitives and it will go away,
we have the right to live our lifes how we want to...even if you think about it feeling guilt doesnt come from inside you , it comes from what others have said...I mean you never said that trans people are sinful and a disgrace and freaks...OTHERS have said that ,,,so forget what they said , empty your mind and think what being trans really means...
pfff for the love of god I think we are more awesome than any other cis girl/dude who is pretentious and only goes with the flow...thinking about it I believe we are truly free...hell some of the cis people I know wont even change their clothes to not disturb others...pfffffff
anyway Emo I think you are awesome

you deserve to be yourself so keep trying