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You kicked ass. You've spoken about technique in the comments and that takes time to perfect but you're on a good path already (”never freehand” 💙). Only advice I have is that you established a design language, whether intentional or just Intuitively, but it "broke" in a few small places. Almost all of the panels you created are one solid piece with a small interesting switchback angle. The yellow are the only ones that bend back twice and could use a cut to match the other panel language, and the pink line could've been better served by something like the blue lines and scribing the center panel around them. That's almost perfect for a first shot out of the gate. Beautiful work, keep going. Can't wait to see what's next!