Do you know if OP has certifications or experience?
Do you know how knowledgeable he is on Linux ?
Beside I will say it again, you can totally teach introductory courses on some subjects without being an expert on it.
And in practice, I have definitely seen people teaching with tons of certifications and alleged expertise on the topic but who couldn't teach anything. And that was of very expensive courses on rather specific Linux topics.
I personally would much prefer to be introduced to a new subject (like BASH101) by someone who has zero certifications but some experience and a real ability to teach.
Because I have seen a lot of super certified teachers who ends up unable to teach anything and who are recycling the same course without any practical experience in the last decade.