Decide on design and height you would like cabinets and shelves.
Remove old items, cabinets and prep the walls as need.
Find studs using a stud finder.
Use 4’ level to mark the line where the bottom of the cabinets will go. This will determine the hanging height of the cabinets and how much extra room there will be on the top of the cabinets. Put up and hold up cabinets while a second person puts a 4’ level on the face of cabinets vertically to see if they will be plumb.
Use a cordless drill and 3.5” screws to anchor cabinets to studs. Each cabinet ideally would be anchored to two (2) separate studs that are typically located 16”s apart.
Once cabinets are hung drill and add a screw horizontally behind the doors to attach them to each other.
Put the doors back on the cabinets. You can also try to put the painted doors back before hanging, but we just thought this way was easier.