SQL Server connection with intellij

I'm a student, i was study JavaFX and with that i needed to use database so i downloaded SQL Server from Microsoft.

now i heard that i can create tables and update and do everything from within Intellij, but whenever i try to test connection it says connection failed..

FYI... i wrote my instance name and the port 1434 and i downloaded the jdbc jar files and iadded them to intellij library.... i think i tried everything i could've done.

so i need your help to guide me use the database on intellij.