In the help Center there is an excellent article called: How do I use the Record My Story activity?
Use the Record My Story activity to add stories of your life to FamilySearch Memories.
After you record your story, it appears in your Memories Gallery as an audio file.
After you type your story, it appears in your Memories Gallery as a story.
Your device routes you to the FamilySearch website, where you can record your story using the earlier website instructions.
The nice think about "Record my story" is that the steps are pretty straightforward and intuitive.