Cucumber growing fundamentals

I've had some problems with my original two transplanted Fanfare cucumber plants. The pollination process has been mediocre — only one successful fruit from four female flowers — and the leaves have been dying off more and more. Though I'm told by a good friend that this is natural, I'm wary about the whiteflies that have been hiding out under these leaves. So, I'm on a quest to learn more about cucumber growing, especially for growing in containers without any direct sunlight.

As for whiteflies, here's what they advise on How to get rid of white flies

Soapy water. I gotta try this immediately.