As has been suggested already, a P226 would not be a good choice for a typical female shooter. The gun is physically much too large. Find a competent teacher in your area (there are very few good ones) and have her learn from someone who knows how to get her started correctly. The learning...
Directly from Sig Sauer? No. From a dealer? It somewhat depends on the dealer and what clout they have and/or what distributor they work through and what clout they have. Ordering an exact gun and getting it can be two different things. If you're willing to wait, sometimes many months, it can be...
Seems like a good place for a first post. Yes, the Mec-Gar 18-round mags are flush fit. Whenever possible, I recommend buying Mec-Gar mags; they are OEM for many Sig handgun magazines and their quality is excellent.
Check-Mate Industries has made mags for Sig but that relationship has gone...