I have tried several different seedling starter mixes and the last one I am very happy with. I am using Burpee refills for their 36 cell planters, drop a pellet in, add 1 1/2 ounces warm water and they expand. I think they are mostly coir. Once you are ready to transplant, go with something like ProMix BX or Fertilome, just try to stay away from Miracle Grow potting soil, IMO it is junk and has lots of "fillers" a.k.a. garbage.
I would get them started ASAP! they can take awhile to germinate but sometimes surprise you. Try keeping the soil temp around 85 degrees during germination and then immediately under the lights as soon as they appear.