Damping off can be a problem with growing from seed - use a purchased sterile seed starting mix and if your pots aren't new, wash them in a bleach solution. Don't keep things too wet, take the dome off when you see germination, not when the last seed you planted germinates. Have fun!

First, you might want to read through all the Seed starting FAQs here. They cover all the basics and then some. Second, the search will pull up previous discussions on most any topic that is part of the process. Things like 'using a dome', 'how close should the light be', 'what light works best', 'best soil mix', 'do you have to use grow light', and even more complex issues like 'using seedling trays', 'mixing different varieties in the same tray', etc. Tons of info already available here.

As for mix, most any good soil-less potting mix will work fine and many brands are available. Personally I avoid the so-called "organic" mixes because they cost more, don't work any better, and can harm young seedlings.

Don't mix different varieties that have different germination times in the same tray. Some will rot and die before many of the others even sprout.

How close the light all depends on the type and size of light. Not all are equal by any means.

Domes are a crutch and must be used with care if used at all.

Dave

Seed Starting FAQs