Learning as we go

Hi everyone! My husband and I are trying to grow in a homemade box. It's about 1.5x1.5x2, lined with mylar, and we have four daylight 1600 lumen cfl one 1600 lumen soft white cfl and one 3800 lumen brilliant light cfl. We bought a thermometer/Humidity thing, and the temp stays about 70-75 while the humidity goes up and down. (as low as 45% and as high as 99%!) I read the higher humidity is ok during flowering as it reduces salt levels.
We both have read just about everything you need to know to grow, hes grown before, and i never have. Using Miracle Grow potting mix, we have 9 plants started from bagseeds and one clone a guy gave us. The clone is pretty stretched and the seedlings (now 2 weeks old) are doing fine. One particular plant smells strong, almost skunky already. The clone is in a 8" pot and the others are in solo cups. We're planning to move the best four of them to the 6" pots. We bought miracle grow potting mix, perlite, and some sphangnum peat moss for when we transfer. Our tap water is 7.8, so we bought a pH test kit and using lime juice it's now between 6.8 and 7.2. We know Miracle Grow isnt the BEST, but it will have to work for this grow. We're planning to get the best stuff for our next batch.So....what is the best ratio for the soil? Is using all of that going to be too much? Any suggestions about anything will be much appreciated!!