The church’s Study by Topic page has many resources for studying different subjects in depth.
If you get nervous speaking in front of other people, just remember that you can pray for peace and courage as you speak.
Have a talk night at mutual, where girls each pick a different topic to speak on, and leaders or another speaker share advice for giving a good talk.
At Young Women in Excellence or New Beginnings, have girls give short talks on each of the young women values.
If you have more ideas or a personal experience you want to share, send them to firstname.lastname@example.org