Heya Donny, welcome to the forums. As for your question, posing is very difficult to explain so I’m gonna post a link to a tutorial on the forums that should help. There are a couple things to keep in mind though when posing and that is that it will take a lot of time and practice to be able to do more dynamic posing. It is also advisable to have a reference picture to hand, in a separate tab perhaps, as they are very helpful for relative ratios and sizes for your pose. One last piece of advice is that posing, even basic posing, is only half the battle. Just making the pose won’t be enough, you will also need to be able to clothe that pose, and most of the standard items won’t work without tweaking and masking. So have fun with it and take your time, no one ever does a perfect image first try.
Tutorial: http://www.heromachine.com/forums/topic/articulated-man-I by-sean-david-ross/
I hope this helps, and happy machining!