Thank you guys for the feedback, you all were very helpful

Hey guys, i have 3 questions: 1) Can you recommend any exercises to practice colors from imagination? 2)For those of us who want to focus on imaginative work, how much of our time would you recommend spending creating imaginative artwork vs practicing from life,reference,etc... 3)when studying animal anatomy, would you recommend focusing on a single animal until you know it very well and then branch out? or jumping around between different animals?