after a bad run before with claiming work which wasn't yours I'm still a little skeptical about this model, however i will assume that it was made from you as I don't really have proof otherwise. Its not too bad really for someone starting out as i do enjoy the design of the model. as some of the others said yes its a little thin but dont worry as my first models were thin as well. You'll learn the concept of depth and more advance techniques to give models more edges and curves the more you practice. One thing I noticed however is your triangles on the model are overlapping. Let me demonstrate:
Your version on a sword example (what i assume you're doing from looking at the model's wireframe):
This is
WRONG as your faces / triangles are overlapping each other and you want to avoid that. (no worries i did this a few times when i started as well!)
Here's what you want to aim for:
notice how the triangles are not overlapping and they are kind of fitting the "missing piece" of the puzzle / frame of the model. when you create faces think of it as a puzzle so you don't overlap the pieces. Here is the pattern i like to follow when creating faces, kinda like a alternating form:
ofc this wont apply for all situations nor is it the best but its just to give you an idea.