I've started the Spanish tree, and I'm very excited to finish it. I'm only level 2 right now, but I'm doing my best. I've set my goal to insane, but I've found it pretty easy to reach it. I would be happy if you'd provide me some tips on the Spanish tree.
Good job on your first two levels! :)
My tip would be utilizing additional resources. The tree is great, but it's even better supplemented with Immersion (start out with the headlines and easy sentences, then move on to the longer sentences as you move up the tree), and outside resources like more thorough grammar explanations as well as Youtube videos and Spanish radio or television to get a better feel for both the structure and the flow of the language.