first make sure your mums ok with it, cause if you do get caught, and they tell your mum, youll be in big trouble. thats what would happen to me anyway.
dont do anything like wearing eyeliner, just mascara keeps it subtle enough. I like Lashed Up by W7, You can buy this brand in peacocks. I don't usually use brands like this, but this is pretty natural but still gives your lashes length and seperation. If you don't want to use this one, try a waterproof formula, because if your mascara runs or smudges throughout the day, it will be totally obvious! To open and brighten your eyes, use a peachy pencil eyeliner on your waterline. Try to stay away from white as it can be quite harsh and pretty noticable. I like the Barry M pencil liners, they're pretty inexpensive but they do last, and theyre great quality. LIGHTLY fill in your brows with a powder (pencils don't look as natural). You can use an eyeshadow. Use a slanted brush, or even an eyeliner brush to apply this. Do it in quick, short strokes along your brow to mimick hairs. Only do it on the outer half of your brow though. Use a very light, peachy pink blush on the apples of your cheeks. I like Bourjous Little Round Pot Blush, they smell great. My favourite shade for a more natural look is shade 34. For lipgloss... well surely youre allowed to wear lipgloss? if not use Rose & Almond vaseline.
Hope this helped! Sorry for the big massive essay:/
Same with my school sug