Ug....beginner grower mistakes

My lack of knowledge knew this grow wasnt going to work. Ended up being infested with spider mites AND mildew. So, I destroyed the 3 plants, sanitized my grow tent, and am awaiting my shipment of seeds to be delivered for a great grow!
To ģanswer any questions...
- yes, I brought these in from outside
- yes, they were all planted at the same time
- yes, I am impatient, but learning more everyday!