Overflow and Best Way For Mobile Conversion

I have been having trouble with overflow. I did watch the CSS video and understand the page dimensions better but I don’t know how to fix it without just completely starting over. I am wondering how can I stop my paragraphs and sections to stop overlapping. Is it because of the rich text I use? I just want my website to look more put together. All help is welcome and be descriptive if you can! Have a great day!

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