I am REALLY stupid and I need help. 

I am trying to fuck around with some of this shared mordhau stuff. I've got blender open, I've got the handle and head of a mace that I would like to make. 
Now what? How do I merge those into one model and then get it into unity? And how the fuck do I do anything regards textures? 

If these are real complex things that would take weeks of learning then fuck it but all I want to do is get this fucking mace into unity and from there I can manage it.