you want to upload something to your account in the cloud, all you need to do is drag and drop the file into the inside of the folder.
Basic Google Drive storage is 5GB, which should be more than enough to store documents, images, and a video here and there. Of course, you can always pay for more space if you need it.
Google Drive is a massive cloud storage tool that, thanks to its integration with the rest of Google's products and its ease of use, ends up being quite useful for any user.