As a spreadsheet entry worker, you must have good computer skills, especially with using spreadsheets. It is also important that you have a good typing speed, including attention to detail. You can begin this work as a high school graduate; however, to advance and apply for higher salaried jobs, you need to train yourself in other skills like transcription, writing, and translation.
Companies will hire you when they have a lot of information that they need inputted into spreadsheets, and sorted in a particular manner. Many times, this includes information typed on paper and scanned into JPEG, or using online forms. When companies have a lot of data to input into spreadsheets or a database, they will outsource the job, but often times this is a short-lived job. However, you may find recruitment and staffing who will hire you for the long-term; in many cases, when your contract ends, the staffing agency will find you another job quickly.