Spring cleaning can be overwhelming, start by cleaning one room entirely so it doesn't seem like so much work!
Take off the blind/curtain on the window and give it a good scrubbing in your bathtub. Move all furniture in the room and wash behind everything. Wash baseboards, vacuum up the dust and mop behind furniture. Dust every piece of furniture in the room.
Clean any bedding in the room and dust every piece of furniture. Vacuum the floors and give it a good scrubbing.