Good to know you participated in the last design class... You made mention of canva app/software as an unprofessional tool...well you are not far from the truth. But come to think of it how many people can make professional looking designs from that tool just like I thought in the last learning challenges.
The irony is that many use professional tool to make unprofessional designs while many use unprofessional tool to make professional design. That's to say It all boils down to your knowledge of design, if you understand how design works, you would make simple, classy and amazing design from so called unprofessional tool/software. By the way, your design look cool. Weldone.