@evilcookies98

h1 is generally the title of the page OR the title of the main article.
h2 will be subheadings
h3 will be subheadings to h2 sections

So you may not be doing it wrong?

What people tend to get wrong is the idea that they can not add h2 below h4. That just means that you are starting a new topic, which is fine. I also see people using h4 in for headings in sidebars (that are about something else than the main article) because they want a smaller font. But since they are new topics, they should often be h2, for example.

So, generally, like this is how one should think (example from the W3C page:

<h1>Plant foods</h1>
<h2>Fruit</h2>
<h3>Apple</h3>
<h3>Banana</h3>
<h2>Vegetables</h2>
<h3>Broccoli</h3>
<h3>Green breans</h3>
<h2>Related articles</h2>

Since this is the internet, someone will soon inform me that bananas are botanically berries. 😊

W3C on headings: https://www.w3.org/TR/WCAG20-TECHS/H42

There has long been a debate about whether you can have multiple h1's on a page, and generally, yes, I would argue that you can. Which Matt Cutts from Google also confirmed 15 years ago:
https://www.youtube.com/watch?v=GIn5qJKU8VM