Should I buy Arduino as a Computer Engineering Student? I'm going to be in the third year of university in a month. I'm satisfied with the software part of my bachelor but I feel like I lack in practice in practical implementation. Would getting an Arduino board and playing around with it worth it and useful for me?
It depends. If you don't have any knowledge about microcontrollers it might be useful.

However, Arduino hides a lot of concepts in their libraries. If you want to go more indepth check other systems like STM32 or PIC.

You also can do both, start with Arduino to get a rough feeling, continue with another.

More important is WHAT you try, don't stop with LEDs/switches, but check communication protocols like SPI, I2c, UART etc. And learn what timers, interrupts etc. are and how to use them.