As someone who is an "experiential" learner and who uses a number of analytical tools (not HydroCAD, as I'm not a Civil engineer), I can understand where you're coming from, Megan.
However, the best way to get experience is by doing - so read the paperwork, follow along through the case study examples and understand what they're getting at, and try a few of your own to see if the answers make sense. You can always check by going back and doing it all by hand the hard way.
Converting energy to motion for more than half a century