Meditation and Pleasure

I have three simple questions relating to pleasure. I have tried meditation many times without generating pleasure. Thus: 1) What level of skill permits meditation to release pleasure? How advanced must one be for this effect? 2) Is focused meditation -- i.e. shamatha -- the *only* meditation conducive to pleasure? Are there meditations *more* conducive to pleasure? 3) Is there still attachment when we want the benefits of pleasure not for themselves, but for an altruistic or wider goal? These are my questions, Thank you.