Honestly, it will seem hard at first but the people around you and you yourself will get used to it. A lot of people find faults about themselves that other people don’t even notice so don’t worry about your nose. As for losing weight, never diet! Eat healthy and in moderation and remember to get your daily physical activity! I think your mom will ease up to the idea of you wearing make up because it really isn’t that big of a deal i my opinion. You will look great in a hijab inshallah. I wish you best of luck on everything and don’t stress about it.
Much love xoxo <33