Ah XD
It's alright tho! I sewed them by hand and they still look alright. You don't need a sewing machine for this one.
Also, you can take white jeans and take their pockets off, so they'll look like simple white pants ( the ones I'm wearing are actually white jeans, but I took the pockets and trinkets off ).
It won't be that expensive, so tell your mom about it, you'll be fine.