You can get away with 2 light sources. But personally id use 4 -
Key/fill/rim/kicker
U have one flash so u need 3 more. Look at any manual lash from yongnuo like the 560III. aBout 73 bucks shipped. If u want to try cls thEn ull need flashes that support it. I think the 565 do and the 568 do. Personally id use slaves. Way more reliable. And since the flashes will be in the softbox u dont want a hit/miss. Radio slaves cost very little today and its just the way to go Imo.
Anyways thing Ull need
-softbox/umbrella/ beauty dish. You can get a good cheap softbox that will give you a nice soft light as your main. No need to spemd so much for a good one.
60cm x 90cm 24"x35" Umbrella Softbox Reflector Brolly Speedlite Flash Shooting | eBay
Ask fotojack as well where he buys his. I think he mentioned linkdelight
-for tHe main u can use the softbox or beauty dish and the other for fill. Me personally? Beauty dish for key and softbox for fill
-light stands. Cant help u. So many to choose from. Get one that can handle monolights if u decide down the line to get them
- cheap 2.4ghz slaves? Commlite g430. Ttl pass through hot shoe. Manual firing of of camera flash. Nice build locking pin and wheEl. Syn to 1/320. Best part, $25 shipped. Check ebay.
-get a short light stand for your kicker light or improvise. Not an issue. Get a box and use that behind your subject.
-get another light trio setup (stand/flash/slave) and that will go to the side behind the guinea pig, err subject and lift it up a bit and aim it down to the shoulder hair. it will give a Nice Edge/rim/hair light which make the image have an accent running across her shoulder/hair. You can also do a backlight setup instead or additionally. the light is lighting her hair from the back to give it a glow. Very nice also. Up to your personl taste. I use backlighting a lot for my wedding formals.
Just one thing u should watch for is spillage of the light. U should get a light meter. Theyre very cheap. Not because u cant shoot and then adjust, but because u should learn anD know how to use one. Its the basics.
Key light is the accurate/base exposure. all the rest of the lighting are over or hnder this main exposure.
Rim lighting is about 2 stops over your key light.
Kicker About 1 stop more but test it And see how you like it.
Fill light 1-2 stops under your key light.
Shutter? Does not matter because u wont be mixing ambient light with flashes. Your exposure is all from the flash setup. Keep it at 1/200 or 1/250. Aperture? Depends on you. I love shallowish depth of field but usually around 2.8-4 is nice. Stopping down makes everything really sharp but no body wants to see their pores and blemishes and imo photoshop work should always be a minimum. Get the picture to about 75% or more then tweak the rest
Backdrop? What will u use?