If you do yoga without a proper sports bra, you would be pressurizing your breast tissue to an extent that it would cause a high level of discomfort. It can even cause sagging, which you don't want! 

Specially made yoga pants, leggings and shorts, designed for yoga, will let you bend with ease, and stretch in the pose. Look for yoga leggings made of a thick, quality fabric, like stretchy cotton.

According to the Hatha Yoga Pradipika, Candle Gazing "cures diseases of the eyes and removes tiredness." 

It also focuses the mind, improves concentration, and is very calming. As such, it is a very good preparation for meditation. If possible, practice in a darkened room.

Your journey into yoga is a personal one, so find a yoga tradition and a teacher with whom you feel a good connection. They might just turn out to be a helpful guide as you navigate your path through life. 

The best yoga clothes include large percentages of nylon, polyester, spandex, bamboo, and lycra because they are durable, stretchy, moisture-wicking, and these fabrics offer the right balance of comfort, breathability and flexibility.