Where to start

First of all thanks for allowing me into your forum.

The whole permaculture thing appeals to me on a lot of levels. However, I will admit that it is all a little overwhelming. I have 5 acres of fairly flat land in the Northern part of Central Texas. I say it’s flat; it may have 2 foot of elevation change and the lowest part being centered of the property. The confusion is, do I do the Hugelkultur, regular swells, a tank (that’s what we call a pond around here) in the middle or what? I know that its about a lot more than how to plant. Its like a whole new way of thinking and all but there are lot of options on how to lay it out. Any advice?