ROTH IRA S&P 500 or Target Date?

I’m 27 year old. I’ve been maxing out my roth ira for 5 years with FXAIX. Ever since I took the course, I’ve been thinking about contributing to a low index target fund. Would it be wise for me to start the target fund in my roth ira along with still continuing fxaix? What would be the best way for me to contribute to both of these funds?