How did you learn perspective? I have seen in one of your tutorials that you used some type of perspective for a background/room for one (or few) of your comic panel(s) and for the tutorial "How-To-Draw".
Also what do you recommend? Should I learn perspective or anatomy first?
I think I must've learned the basics in grade school art class and from tutorial books I had as a kid. Some I picked up from observing how other artists do things. I spent a lot of time as a 3d modeler, and that certainly helped my understanding of how to apply 3d concepts to 2d art too.
Perspective drawing and anatomy aren't wholly separate things, really. Characters and other living subject matter exist in 3d space - in perspective - just like everything else. Any figure, character, creature, or other living subject you design or draw from observation and the breakdown of shapes comprising its anatomy are things you will want to learn to apply perspective to in order to avoid it looking completely flat. Everything from how the feet are planted on a ground plane, to foreshortened limbs, to the dimension of a flexed muscle, to how turning a head from front-facing to 3/4 view affects the angles of the face are matters of perspective. It will also help you to draw that anatomical subject/character convincingly into a background where the rules of perspective apply on the whole.
I guess what I'm saying is, you can strengthen your perspective drawing by drawing anatomy, and you can improve your anatomy drawing by studying perspective drawing. You don't have to tackle one and then the other in a sort of dry, strictly regimented way. In fact, it may be more practical to lean them in tandem. My overarching advice about this is that drawing will make you better at drawing. So, approach learning in whatever way keeps you interested in drawing. Curiosity is great, recognizing your weaknesses and working on them is fantastic, but you won't get anywhere if it all feels like an un-fun chore from the outset.
If you aren't sure where to start, though, there are plenty of resources out there. If you haven't had a primer in perspective rules yet or you want to brush up, dimensional box-drawing is useful, easy to comprehend practice. Here's an instructional Proko video that should make it clear how those boxes apply both to anatomy/character drawing as well as to background drawing.
