Complex sentence: Rashmi started performing as a Hindustani Semi Classical singer with Thumri-Dadra, Kajari, Holi performances only, but with time she has added other forms of music like Bhakti, Sufi music and Ghazals in her repertoire of performances.
Split into simpler sentences: Rashmi started performing as a Hindustani Semi Classical singer with Thumri-Dadra, Kajari, Holi performances. Slowly, she has added other forms of music like Bhakti, Sufi music and Ghazals in her repertoire of performances.