Welcome to Android Central! LTE tablets typically don't have the ability to natively support SMS/MMS. Samsung tablets can usually do this as long as you have a Samsung phone, but this is specific to Samsung. You'd have to use some other messaging platform that you can install on your tablet, like Telegram.
Additionally - that device is quite old. I wish you luck finding a modern messaging app that will support the OS on that device, if you can even get the Play Store to download a new app.