How to build cupboards?


I am remodeling my bedroom. I only have a low budget. My plan is to keep the room minimalistic. Since I am on a budget I am getting most things from local stores that sell cheap products. I am getting my furniture from this surplus furniture store in Edmonton. I am planning to build the cupboard on my own. Please tell how I can do it. This is my first time doing such a thing. I am researching it. Tips from experienced people would help. Thank you.