Sadhna of Tara Mahavidya needs proper initiation by an ready teacher (Guru) but nevertheless you can achieve her blessings by other usually means of worship. Goddess Tara is delighted by chanting mantras, performing worship either about the impression, or by the help of Yantras (mystical diagrams) and by sure https://www.youtube.com/watch?v=GMMWwN9ho2U&t=6s