Hello everyone. I'm working on my first template and can't figure out the nuances of semantic markup (in automatic key).
I apologize if some of the questions are inappropriate.

The first question is about the <aside> tag. How correct is it to place the all sidebar zone in it? because the content of the sidebar can contain a variety of elements, such as widgets, navigation elements, search filters, ad units, etc.

The second question is about the <header> tag.
Here is an example, how correct is it?

<header>logotype \ navigation</header>
<nav>breadcrumbs</nav>
<main>
<article>
<header> <h1>Article title</h1></header>
article content
</article>
</main>

maybe it's better to move the <h1> from the <article> or from the <artcile> and <main>, like this?

<header>logotype \ navigation</header>
<nav>breadcrumbs</nav>
<header> <h1>Article title</h1></header>
<main>
<article>
article content
</article>
</main>

which design is more correct or is it better to do it in a completely different way?