As to us, We will eventually sit down, long and happy, but not now. To begin the practice, you can sit on a chair for only a very brief period of time, with legs uncrossed and relaxed, or you can lie down, or you can walk, whichever way you feel most comfortable with. Second, learn the value of doing nothing. Doing nothing is not wasting time. After all, a life spent running to and fro, filled up with doing this and that, is not exactly something to write home about if it is not imbued with a sense of meaning to all that noise and fury.
Meaning gives action fullness.
To appreciate that doing nothing is as good a way as any to pass time is the first step toward cultivating a sense of time irrelevance and later a sense of timelessness in meditation practice. You have to accept idleness before you have a chance for calmness. And only when calmness is in place will serenity and fundamental understanding arise. Third, while a shirt from a mass merchandise rack may fit many, it doesn't fit anyone very well. The recommended routines that follow are similarly subject to such flaw.