oooooh... now I can help you. If you have access to a hydro/soil/equipment store, I highly recommend Fox Farms Happy Frog for this early stage... it promotes good root development. If not, get some Miracle Grow 6 Month and flush it a couple of times really good before you put the young plants in it in order to rinse that initial nitrogen load they put in there away, it is usually too "hot" for seedlings. For this first stage, put them in beer cup sized pots, and water them really good. Then, leave them alone until they dry out. You are growing weeds, and they need to have a clear wet/dry cycle in order to thrive. Get used to the weight of the beer cup when it is dry, and use the lift method to tell when it is time to water again.

Don't make the mistake of putting the seedlings into too big of a container. It might seem like a good idea, but it is not. Right now, it is all about root development, and a large container is going to do things to those roots that are not very beneficial. Water slowly at first, even using a spray bottle if necessary. The roots are not very well developed yet and the plant will tend to move around in that first container if you are not careful. Water to the point of runoff... by that I mean slowly and until it starts coming out at the bottom. If you carefully measure how much water it takes to get to that point, you will be able to see your root growth... as the roots get more developed, you will be able to add more water each time than you could at first.