Check the retailers return policy. Your best bet is to read as much as you can about raw denim and learn about the different cuts, how they fit, how they stretch, etc. try on what you can and then search online to see how those compare to other brands.
Yes people wear their jeans daily for months at a time, sometimes longer. Totally standard and if you're thinking of washing your raw jeans more than once in a great while you're defeating the purpose of purchasing them. They should conform to your body and fade accordingly, making them unique. It's not hard to keep them clean and any odors are killed by setting them in the freezer with baking soda over night.
Skunk,
These are the MWaC's. Pretty sure I got them at least one size too small, but for $40 it was worth trying them: