Regina,
Thanks for reaching out! Regarding your first question:
1. FRONT END COMMUNITY FORM / EXCERPT
Unfortunately, it’s not currently possible to add an excerpt field to the Community Submission form. However, the List View displays the excerpt by default (which is created by WordPress automatically from the full description). If the automatic excerpt is still too long for you, then you can customize the length by following the instructions in the WordPress Codex (link).
Is there a way to add instructions to the front end community form?
Yes! You can do this by following this tutorial: https://theeventscalendar.com/add-html-above-community-events-submission-form/ You’ll definitely want to customize the HTML message to suit your needs, but that should do the trick for you.
Please review my responses above and let me know if you have further questions. Thanks! 🙂
-Casey-