Set you mind in the right frame. Be positive and focused. Anyone who can talk can sing through careful practice and close listening.
Know the 2 main types of vocal compositions in Hindustani music. They are dhrupad and khayaal. Dhrupad is the oldest form, fully austere when sung, and requires rigorous voice training to get perfect rhythm control. Khayaal has slower more lively compositions and is considered to be the more romantic of the two.
Sing the 7 basic notes in different combinations to get used to the sound and how it feels to create it.
Be knowledgeable about the 10 basic ragas, each with distinctive qualities. 2 identical notes sung in a different structure or temperament will create 2 completely different ragas. Some note arrangements are taboo in some ragas and it is important to remember when practicing Hindustani music exercises.