I do know a lot about kimono but I'm kinda tired right now so I'll just tell you that I really recommend you join and ask over at Immortal Geisha's Facebook group
instead. There's a lot of very knowledgeable and kind people out there willing to help beginners who have an interest in traditional kimono.
You can find authentic kimono on eBay (try searching "vintage kimono Japan") for cheap but be wary of the fakes. Then again, they're really easy to tell apart once you know what to look out for. I've bought vintage kimonos for less than 10 dollars, excluding shipping... well, men's kimono, but still.