"I think so many people know me as Stephanie and as that character, which is amazing and there's been incredible support for it," she told PEOPLE on Tuesday. "But now I get to show people who I am and also, I kind of get to find out stuff about myself."
Sweetin met partner Keo Motsepe "about a week ago" and is eager to compete against the likes of fellow sitcom star Kim Fields, Good Morning America host Ginger Zee and Mischa Barton, among others. The full cast was announced Tuesday morning on GMA.
Votes she's sure to receive? Those from her fellow Fuller House cast members.
"They are so excited," she told reporters. "They have known about this for a little while and they are just thrilled. They wanna come support me, they can't wait to be in the audience. They want to be there every week – Candace and Lori and Andrea and Dave – all of them are like, 'We're gonna be there cheering for you!' So it's great. I have a lot of love and a lot of really wonderful family support from them."
Her on-screen older sister, Candace Cameron Bure, also offered some advice to the season 22 contestant. Bure had a successful run on the show in season 18 and finished in third place with partner Mark Ballas.
"She said that 'This is gonna be a challenge, you will push yourself, you will work hard, but you will love every moment of it, and it's a once in a lifetime experience,' " she told reporters. "So I'm really trying to just soak up and enjoy each moment."
While she told reporters her biggest challenge thus far is "not leading" during rehearsals, she said she has her eyes on the prize.
"My goal is to win," she said. "I came here with my eye on the Mirror Ball."
And with the support of her Full House family – costars, as well as her "great, loyal, amazing fan base" – she hopes to do just that.
Season 22 of Dancing with the Stars premieres March 21 on ABC.