When I first decided to dress up like a muslim girl, I first started covering my head with a long cloth (Chador). I was in grade 10. I started covering my head and continued studying at Barua Sir's math coaching.
Then I realized that my hair wouldn't stay in my covering, so to hold it in place, I started wearing a small cap first, then the main Orna (a Long cloth that comes with my dress).
Shyama, one of my class mate in the coaching once started saying, what is this, first cover your head now added more items to cover your hair. I just want to inform you guys that she is a muslim woman too. Though she doesn't cover her hair. Before anyone says anything else, Borua Sir said, "NOBODY WILL SAY ANYTHING TO HER. IT'S HER CHOICE." Just to let you know, Borua Sir wasn't a muslim man, he follows Buddhism. And I found him to be a great person and a great teacher. In that coaching, nobody said anything to me about my dress up.
Later, I asked my mom to make a Burqa (A long, loose garment covering the whole body from head to feet, worn in public by many Muslim women) for me. She ordered the tailor to make one for her and one for me. Yes, in my home, I started wearing a muslim dress first. Then my mom. Later, my sisters. And I never ask anybody to follow me.