Sew what you like and forget the police.
Since it is a sampler and you sound like you are new to this I would suggest starting with blocks without a lot of pieces and work your way to the more difficult ones. (quilterscache marks them according to difficulty)
Do you have colors picked out? Sometimes a sampler is different blocks with coordinating fabrics but can also be the same block with different fabrics. With yours going to be king-size don't forget to allow for sashing which can also help if the block sizes are slightly different.
Good luck. Have fun and remember the board loves to see pics and we also love to offer advice!
Kathyd