Just type like normal and don't try to get fancy with colored text or exaggerated fonts. 

• Avoid excessive boldface, ALL CAPS, and underline (indicates a live link).
• Do not leave raw coding visible like this, https://www.fcps.net/Page/125 or webmaster@fayette.kyschools.us, which is unfriendly for screen-reading software and assistive devices. Instead, embed links in the text like this example: Visit our district homepage or email the webmaster.
• If using subheds like below, go in descending order of size as if you're making an outline, which is helpful for assistive devices. 
• After a series of bullets, use a soft return to allow adequate space before the next subhead or paragraph. Just hold down 'shift' and hit 'enter' here.
  
  

Heading 2 (18 pt.)

You can use a bulleted list or a numbered list.

• One thing
• Two things
• Three things

1. Dogs
2. Cats
3. Birds
   
   

Heading 3 (14 pt.)

I can embed a PDF. I should also embed email addresses like this: Tammy Lane.

Heading 4 (12  pt.)

I can also drop in a photo like below. You can experiment with the size until you get a feel for it.
Note that when you hover on the photo, you see the "alt text" -- a requirement for ADA compliance and web accessibility.