Hey Douglas! Bem vindo ao ArtSchool 😃👍
Your pieces are amazing already. And I'm quite jealous of your measurement assignments, you nailed them really fast! (It took me WEEKS of pain and suffering to start getting them right 😅).
I also really liked your 1-point perspective assignment. As far as the perspective and proportions go, you nailed it. Maybe one thing to think about as you move forward to 2 and 3 point perspective studies is the line art: things further from "our view", their lines can be softer, and as the objects get closer and closer, the lines get thicker and darker. Makes sense?
Keep up the awesome work! Looking forward to see what comes next!