Hi there. After reading a bunch and seeing a lot of photos, I would like to ask this. I see lots of people starting in small square type pots. Then from there to a small clear glass. It then seems they then go from there to the traditional Solo type cup. Am I missing something. I am new to all this and would like to succeed. I have just went from seed to 4" pots. Am I missing something, or am I doing anything wrong. Is there a reason many do it that way? Thank you.