Me, my wife and our 3 daughters all dive. We (the parents) are the ones that footed the bill for all the gear as my daughters are now 11,12 and 16 yrs old.
My gear is representative of ME and how I am. Its my style if you will.. I have Apollo Bio Fins (said to be the fastest split fins on the market). I have Tusa booties because I prefered their sole. Its much more like a normal shoe than a neoprene rubber sole. Here, the quarries are very rocky. The neoprene did little to make the walk to the water any better.. Soon after, I got the TUSA booties and life is peachy! I can walk on glass if needed. I went with a back inflate BC with a bunch of steel D rings so I can clip my collection of junk all over it.. (I normally carry an all aluminum reel, safety sausage, flashlight and writing pad as part of my normal kit. I have 4 people usually down there with me, I like to be able to get my point across easily.
My wife is decked out differently. She went through a period of BC purchasing that can only be described as an addiction. She bought 3 in 1 year alone. We had enough BCs in our closet to make it look like its a store. She finally found a BC made for women she likes. Its a jacket style but its what she prefers and she has tried out plenty! She uses some of the cheapest fins available. (I normally sell the same fins she uses for like $20-$30 on ebay) They are TUSA Liberator paddle style fins. In fact, my wife and 2 of my kids use these. My youngest uses higher cost Mares Mako fins (I am pretty sure thats them) to chase any fish that catches her fancy.
So you can say we have gone all over, and bought everything from the lower high end to the cheap stuff.. Not one piece is better than the other if you yourself do not like it.
I prefer having a higher denier count on my nylon. I am rough on stuff and need the extra strength. I had Tusa Xpert Zoom fins in black before going to the Apollos and I did feel a difference in the water. My wife, an ex high dive, swimmer and lifequard, can out swim me easily so I needed the extra power and speed of the splits so I can keep up when we start to really get going. I am an avid bicyclist and an ex racer of bikes so I just modify my natural kick underwater to optimize the split fins and achieve a very good propulsion with very little effort on my legs and knees.
So there are tons of choices. because you are a female, you may have some fitment issues around the chest area. It is crucial to make sure you get gear you will enjoy wearing. At stores, when we tried gear on, I would pull firmly on the back as if the bc had a tank and reg on it. You want to feel the BC loaded to see if it is pressing in odd places. I also had my kids inflate them to make sure they didnt feel like they couldnt breathe normally when its fully inflated (vests just were crazy uncomfortable for me.. my kids seem to prefer them over back inflates..)
So take your time.. You can find a perfect mask. My wife went through no less than 5 before finding one. Store fitment seemed good but once at depth, she would find it had too much pressure in one area or leaked (improper fitment).
My mask (a Tusa Visulator) doesnt leak. In fact, after a long dive you can see sweat beads on my face. I lucked out. It was only my 2nd mask purchase.
Snorkles are a fun debate.. When you get one, you dont need it.. Or lose it.. When you dont have one, you are in desperate need of one.. We have a bunch.. but at times would leave them at home thinking we dont need one.. then we get a wild idea to go snorkling or surface swim far out before diving down.. I say get a cheap one and find a good place to stow it in your BC out of the way.. when you need it, it will be there.. when you dont, it will be out of your way.
Good luck whichever way you go. If I were you, I would monitor craigslist and ebay and wait for some killer deals. In the meantime, when you dive, rent the gear to get a good idea of what you want to buy.