|help| I Need Help With Model Creating

Hey guys, recently I have become very interested in 3D model creating, but for some reason... All my items are glitched. Some of you may have seen my 3D emeralds, and I am good with creating those to look OK on screen. However, if you saw my f5 pics, they were severely glitched. This, for some reason, really ticks me off. I also want to make models for the community, and I'm not sure they will appreciate a wand that goes straight through your arm. I also want to animate some 3D models, and my model creator (MrCrayFish's) doesn't allow that. Can anyone help me with this? I would appreciate it!