Thank you billions, Julie! <3

On images, I've learned that my best bet is to just drag the corner into the size I want, watching the numbers move on the right-hand size as I go. Like you, however, I wish you could enter a size and have WP keep the ratio and fill in the remaining measurement. Alas, not yet.

As for your specific questions:

1) I don't see an option for changing the Heading color either in the basic WordPress format. However, if you're willing to install a plugin, Advanced Rich Text Tools for Gutenberg allows you to use color in headings and word by word.
2) If you're doing Media + Text, then that's a particular format that I don't know how to alter. What I would recommend instead is just inserting the image above the text, then left or right justifying the image. The paragraph text should realign on one side or the other of the image.
3) So I'm assuming you manually insert an image, yes? From there, you'd look over on the right-hand sidebar, make sure it's on Block not Document, scroll down to Link Settings, and choose Link to: Custom URL. You should be able to enter your affiliate link from there (and have it open in a new tab if you want). If that doesn't work, let me know!

I saw your comment that you went back to the Classic Editor, but if you do to go the Gutenberg/new WP format at some point, there is an option under Layout Elements for More, which does the "Read More" break. I don't actually know about the symbols, though, because I always use Alt Codes, like Alt + 0176 gives you the degree symbol: °.

Glad I could help, Candace!

You're welcome, Shari!

All that said I am ever so grateful you created these posts as they helped me troubleshoot, so thank you!

I have a couple of questions. 🙂

1) is there a way to format heading style (changing the color)? I can't see a way to do this.
2) is there a way to set defaults and have them stay that way? For example, if you chose Media & Text, the test default is large, which is waaaay too big for the 9/10 times I'll use it. Having to change it each time is a pain.
3) Becca was trying to embed an affiliate link into an image to amazon and couldn't make it work--any advice?

THANK YOU BILLIONS!