I use the Jiffy Greenhouse with 72 pods. Very successful.
When they get bigger, use Miracle Grow potting soil in 4"x4"x4" plastic containers with holes in the bottom - Dollar tree. I can use them again and simply put them in the dishwasher. They're clear so I can see the roots.
I'm also an epsom salt girl. I watered them continuously until transplanted with Gallon of water and Tblsp of epsom salts. They were magnificent.
Make sure you harden off your plants before transplanting into your garden.
Be patient.
We haven’t even made up our list of seeds yet. Hubby has converted totally to heirlooms and Bakers Creek.
Not sure when we will start seeds in 2019.