Take a look at Ola Hallengren's maintenance script https://ola.hallengren.com/ or Minionware Backup http://minionware.net/products/backup/ if that's to much to take in, take a look at a creating a maintenance plan https://docs.microsoft.com/en-us/sql/relational-databases/maintenance-plans/options-in-the-back-up-database-task-for-maintenance-plan.