#first coordinate

It all looks fine. It’s very simple though. Between the two skirts, perhaps choose the one that you feel you would more easily be able to accessorize. If you were to get L303 you could go with strawberry and chocolate themed accessories and if you went with L482 you could do bunny and princess themed accessories.

I really can't tell you that without more information. Since it's your first coord you have to keep in mind that you're not only going to need the obvious skirt and blouse, or OP, or JSK and blouse, but you're also going to need a good petticoat, bloomers, socks, shoes, and accessories. It can depend on where you want to buy it from, how elaborate you want the coord to be, how much shipping will cost to wear you live, and other factors. Instead of me trying to give you an estimate I think the better thing to do would be to search around and put together a coord that you like, making a list of the items and how much they cost, and then calculate how much it will be when you know what you want.

There are two ways you can look at it. You could get an OP which would save money up front because you wouldn’t have to buy both the skirt and blouse. Or you could buy a skirt and blouse that are both fairly versatile that you can use in multiple coords down the road (the skirt with different blouses, the blouse with different skirts and JSKs) which will save you money in the future. A good idea would be to get a white blouse to get a good amount of future use out of it and then go with a pink skirt, be it printed or not. Just as one example, this skirt has a lot of cute details in the way it’s made, but it’s also fairly simple in that it doesn’t have any prints or patterns. You could use it with a number of different colored blouses (white, sax, lavender, pink) and because there’s no print you can use a lot of different themed accessories with it. You could definitely use it with a lot of star accessories for a star themed coord, you could also do it with animals, carnival themes, cakes and sweets, etc. You could also do something like this which gives you the star pattern and can also be worn with a number of different blouses. However it’s less versatile because of the specific theme of the print and it’s a little above your desired price.

Also, for future reference, to make sure it doesn't turn out so small, I would recommend using Polyvore for future coords rather than paint.