if your new, something 1 part and simple would be my recommendation, and FNB is about the easist... FNB = flora nova bloom... You can use it from start to finish!
I did 6 or 7 grows using their Aqua Flakes until recently switching to Cultured Solutions. I got good results from the H&G but am getting even better with the CS. If you go with the H&G, don't get their organics, Roots Excel, Algen Extract and Amino. They will only cause issues and are not recommended by H&G tech support for use in rdwc.