I have viewed the tutorials on your website. I found them really interesting. The primary reason for me to apply for this task is that I, myself, want to learn DevOps. Secondary reason is that I write really well.
I am an Electrical Engineer with one year experience of research writing. I am currently working as a Software developer at Confiz Solutions. More importantly, I have been doing content writing for 3 years (online and onsite). You can check my portfolio for samples from a tutorial series which I wrote on JAVA vs. C++.
I will write a tutorial for FREE for demonstration of my skills.