Hello, I am having issues having my mobile menu show up for my magazine.

I also had a previous issue where I struggled to set a template as the default layout for a blogpost. I would appreciate it if you could help me solve these 2 issues. If you could teach me how to solve them on my own in the future, I would appreciate it so I wouldn't need to hassle you in case I would need to change these 2 aspects of my website in the future.
Thanks in advance

Hi I have yet to receive a reply