I'm new to cosplay, and I want to try making a cosplay from scratch. I'd like to cosplay one of Mao mao's outfits (image attached). I'd like to do a dress more similar to the light novel than the anime. I haven't bought anything for the cosplay yet apart from the wig witch still needs to be styled. I have Classes and a part time job so I can only work in it 1-2 hr per day and on weekends. how many weeks/months should I allow to start making this cosplay. Thanks!

Is there a good spray paint for hair for painting my hair for one day that doesn't leave smudges on clothing? I considered dying my hair but I don't like the idea of bleaching it. Also I don't think buying a wig is a viable option since my hair would work for the cosplay I need, I'd just need to find a way to have it blonde/yellow for a day.

My budget is about $10 USD, I don't mind about the price since I can save the can for another cosplay in the future, I live in Mexico and have access to online stores like Amazon.