Snakker here, good stuff so far! I really liked that mech concept where you mashed a couple of real life military stuff to make a new concept, I think that's really cool and gives a kind of metal gear feel.
As for making things look alive, I think the key is using the fundamentals to your advantage to be able to convey any particular feeling you are looking for. I'm far from getting there but I do like appreciating how artists use the fundamentals to make a work feel bigger than life, another makes you feel sorrow, another might convey the innocence of youth etc. A lot of it comes down to observing the real world, life, and using what you observe - those little details that to you may convey something, some nostalgia, a particular feeling - something and use it to make something feel more alive. I think it comes down in the end to doing all these studies so that perspective, construction, gesture, composition, the figure, color, depth etc come together as tools for your own artistic vision to be able to convey those things.
In other words, you really shouldn't feel disheartened if your drawings feel lifeless at this point, it just means you still need to spend some time learning the fundamentals and then when you have mastery, even of one or a couple, you will be able to convey emotions and ideas much more easily in your work
cheers and keep it up!
