Yes start the CO2 from the beginning, you can start on the low and work up.
As for the lights, if it is reasonably well lit rooms leave the lights off for a week or even two, and then start with two lights. If you have a shade cloth or screen or anything use it to keep reduced light for a week or two. When working up to full lighting makes sure, your CO2 is sufficient and then shade the next lights for a while. :gw
I believe too much light too early is responsible for many of the problems in new tanks. The tanks are simply not acclimated to all the light, the system is going through many changes, ramp the light up slowly. You may find you really do not need all that light.