Preparing for my first grow need some tips.

Hello everyone, I will be starting my first grow and I'm going to do it using a hydroponics dwc system. I ordered some seeds from attitude seed bank, specifically Pyramid seeds and Sensi Seeds. I been tracking them they should arrive either today or monday so I'm pretty excited. I'm on a budget and plus this is my first grow so I don't want to spend soo much just in case I screw up. I will be using cfl lights. I been visiting Walmart and It looks like I will be purchasing a total of 3 65 Watt CFL's and a 12inc 75 Watt fluorescent tube for a total of 270 Watts. I'm not exactly sure if this will be enough for both my vegetation stage and flowering stage. I will be using Fox farm nutrients, and some rock-wool from my local hydro shop.

Please let me know if the lights will be sufficient or any tips that i will need to know. Thanks