Sounds like you're doing really well! As for your first question, some people will tell you differently, but I am of the opinion that no, you should not do this. This video sums up my feelings on the subject better than I really could: You're trying to build a relationship with your bird, and doing that will not go smoothly if you're forcing or making him uncomfortable. You want him to associate you with good things. Flock Talk, BTW, is an excellent resource, and she has a video all about teaching step up that might be helpful, as well as one about basic parrotlet care. A contact call is a good sign! It's basically your bird asking, "Where'd you go?" and means he's starting to feel better about you. Try calling back to him to let him know where you are.