https://danielmiessler.com/blog/so-you-want-to-start-a-blog
https://danielmiessler.com/blog/why-everyone-needs-a-blog
This kind of addresses the "how do I get over $X": https://igorstechnoclub.com/why-you-need-to-blog-more-even-i...
I took Meissler's advice after reading the "Why Everyone Needs a Blog" article. I had already come to "Igor's Techno Club" ideas by the time I read it, but Igor is very convincing.
I think your motivation and content ideas are perfect. You will get better at writing by writing - that appears to be the only way to become an accomplished writer. As far as not being experienced, Mark Twain once wrote that "Experience is what you get right after you need it". Just do it. Be a human.
My blog: https://bruceediger.com/