Great start!
The advice already given is excellent, and if I may add one more suggestion: read and ask questions, then read more and ask more questions.
My favorite part of reefing is that it's a blend of art and science. There're immutable scientific laws that govern the way an ecosystem survives, however getting it to thrive requires your own thoughtful interpretation and application of time-tested strategies. That is to say, everybody's system is different and philosophies vary, but finding what works for your box of water is the joy and challenge.