OK. Since you are still in the early stages you may as well remove your database and start again and then see if the default ticket template works for you.
There are many posts here on the forum that explains how to configure, delete and migrate your database. Remember to take a look around the forum because you will probably find that your questions have already been asked before.
Be aware there are several ways to setup the database for SambaPOS, either a text file, a LocalDB or a Microsoft SQL database.
Take a look at this topic for information on deleting your current database: