Again, look at the motherboard manual. It's all there. Yes, it can only go in one way, and there is suppose to be no force putting it in. There is an arrow to the lower left hand corner of the CPU, if the words are read straight from left to right. There are also two notches on the CPU, that match to the socket. So it would be really hard to mess it up.
And the part where you close the latch, yes it's suppose to be tight. You wouldn't want it loose, and falling out, right?