Maynard appeared on Brad Womack's second season of The Bachelor where she won the bar owner's heart, although their relationship later ended.
In a preview video for tonight's The Bachelor, viewers are told they will get a "special sneak peek" of Maynard's journey.
"Life after breaking up with Brad was really hard on me, but my life has gone back to normal," she says in the trailer.
"Coming back to The Bachelorette is definitely a huge risk. I'm scared of getting my heart broken again but I know what love is supposed to be like and I won't settle for anything less than that."
Maynard is also shown getting tips and advice from former Bachelorettes Ali Fedotowsky and Ashley Hebert.
Watch the preview video for tonight's The Bachelor featuring Maynard below (US users only):
Hebert, who is currently engaged to her The Bachelorette pick JP Rosenbaum, recently said: "I was so excited for Emily, one because she really is the sweetest person I've ever met, and I was really sad that her and Brad didn't work out because I thought they were a good match.
"I know Emily is going into this with really high hopes that she does find her one true love and after everything she's been through I hope she finds it."
She advised her to go into the process open-minded and ensure that she has fun.
The Bachelor airs tonight at 8/7c on ABC.