I assume you mean the online CMS component. So the answer to the first part is yes. Create a new page in the Project, put the CMS Online Editor Component on that page. Publish your site. In your browser, go to that URL (e.g. yoursite.com /online) and follow the instructions to create your administrator/password.
However, if you’re going to do that, I’d strongly suggest that you first build out the YAML frontmatter in your CMS in the Project itself, as the online editor will inherit that. In other words, if you want a “published” field, add it to the microBlog Project first.
I assume you mean can you later, when the AI integration is completed by Realmac, then use Claude to style, change, edit, fix, add to your site? The answer to that is yes.
What you’re doing is establishing structure (current Elements CMS via microBlog, adding online editing via the pro feature, and then later styling probably via Claude). That’s a reasonable approach, though for someone not sure of what style/structure they really want, it might not be faster than learning Elements and building out from scratch.
I would suggest starting with Part 3 of that series, as some of the basics I didn’t get from watching Part 1 are explained there. Then it all makes sense. Good luck!