This is a reflexive verb, which means that the "se" must correspond with the subject. In this case the subject is "yo" which means that you must change "se" to "me"
You will then conjugate the verb normally (I am going to assume that you need it conjugated in the present. If not let me know)
Yo me ducho temprano todas las mañanas.
This sentence says:
I shower myself early every morning.
Hope this helped!
~Just a girl in love with Shawn Mendes