Can a Muslim say the shahadah again?

Assalamualakum, I was born as a Muslimah and still am one. Recently I have wanted to get closer to Allah and increase my imaan. Over the years I have not been a good Muslim, in my past I used to skip my prayers (I’m embarrassed of that) and I lied a lot. Though I have repented I still want to be a better Muslim. Should I say my shahadah again?