Hello Meg! All the answers here are correct.
I also agree with you, at first this subject can be confusing.
As you continue to review your material, you may see this "estar vs. ser" in a new light.
You may find that some words in Spanish will change its meaning and it will be solely depending on the verb of your choice. Words like "distraído, aburrido, callado, alegre" will either mean something slightly or completely different if you use "ser" or "estar".
Feel free to play with these words, make some sentences with them and discover how versatile your Spanish becomes as you master the difference.