I would reccomend Horse Supplies, Dewormers, Equine Supplements & Tack - Horse.com
the prices are alright, and the shipping is awesome! HorseLoverZ
the items are so cheap, but they get you on the shipping >.> tricky people.. Horse Supplies, Horse Tack, Horse Sheets, Fly Sheets and much more from Schneider Saddlery
Scneider's Saddlery. I love, love, love their stuff. They're pricy, but you can find some good deals Dover Communications
nice, but freaking expensive.
I don't know how "proper" you need to get but..
here's a list breeches
(my favorite brand is tuffrider, they're so comfortable, durable, and the price is great!) boots
(tall or paddock)
^ in my opinion I have paddock boots and chaps for every day riding, I only have boots for shows^ A helme
t! is a must! (I recommend IRH for quality and comfort) Shirt
a normal T should be okay.
oh and for breeches, since it's just lessons, I would say just get schooling breeches. Whether they are full-seat or kneepatch really doesn't matter TuffRider Ladies Cotton Schoolers - Horse.com
^ I have a pair of those, and so does my friend
We absolutely love them. I ride almost every day, and they last awesomely! Very comfy!