Hi guys, just started to do some yoga, mainly to gain flexibility but for the other benefits too. Couple of questions: 1) if you can't complete a position due to not being flexible enough, do you just push as far as you can using correct form? 2) if a position is really painful, do you slightly ease off or push hard until the pain is unbearable and then stop the position completely? 3) Any recommendations for good free yoga videos for flexibility? Thanks!