I would fully agree with InnerAthlete that one should seek a very skilled teacher, and also with the others things he said.
I remember when i attended my first yoga class, i felt bored by the class, and thought it was like middle aged women stretching… and needless to say did not go back to this teacher.
But i was lucky that 6 months later something drew me back to ‘try yoga again’ and this time the minute i walked into the yoga room i could ‘feel the difference’ and there was nobody in the room other than the teacher himself. He was a Swami and had dedicated his life to yoga. I had been practiced meditation almost daily for a prior 10 years, and ‘knew’ that this place i had entered was right for me.
I would add that it is a good idea to try to match what it is ‘you think’ you are looking for, to the form of yoga that you try first.
So if you are over 40 years of age with a bad back and are looking for stress reduction and inner relaxation i would not recommend Ashtanga yoga. I would probably be recommending Satyanada yoga or maybe a Sivinanda yoga teacher provided they had many years of experience.
If you are 20 years of age, quite hyper in your behaviour and at this stage of your life are really hooked on fitness and getting a good workout, i would probably not recommend you to try Satyananda yoga first… and instead may be recommending you to find a good ashtanga teacher who also practices meditation themselves and tries to bring ‘an awareness’ and appreciation of the wider aspects of yoga outside the usual ‘hatha focus’.
It is very often the first steps we take with a teacher than can either inspire us to go further, or sometimes may even lead us astray.
I wish you well in finding a good teacher for you.
Best Wishes,
Dave