There are loads of ftms and other transmasculine people out there that never played with toys viewed as masculine, or that did but now they like to wear make up and dresses - just as there are many cis men who like to wear make up or feminine clothing styles. It just happens that as trans people, society holds us to much more rigid gender notions than cis people are held to.
It can be confusing but you just have to remember that you know yourself best. I tend to imagine that i was assigned male at birth, and think - if i did this or liked this, would i have people around me telling me that i HAVE to transition to female? I don't think that's likely, and so logically my hobbies or interests can't prevent me from being male now.
It's also possible that you're trans, but you're not 100% binary - it might be worth exploring non binary genders as well. That said, don't feel that you
have to identify as non binary just because you like things some that society sees as female
As for your family, you don't HAVE to come out to them immediately unless you want to. If you don't feel safe doing so it's okay to wait until you're at a point where you do. If you're 18, it may be possible for you to start the process by yourself depending on your finances/ living situation. Sometimes, families that start out transphobic are just not educated enough, and having a trans person in their lives motivates them to get educated and changes their opinions. If you're lucky

but you know your family best so that decision is up to you.
There are a lot of trans communities online that might help you cope in the closet, including here, and tumblr, youtube and ->-bleeped-<-, as well as some secret facebook groups for ftms or transmasc people.
It's also acceptable to feel like you're not the gender you feel you are until society acknowledges you as one. it's reasonable to feel that way when you consider the way that society affirms binary gender and gender roles - cis and trans people are raised to expect other people's view of you to be part of your gender identity. It
shouldn't be important to us, in an ideal world, but it often
is, and that's not our fault