A7 GSM MODULE WEIRD CHARACTERS ON SERIAL MONITOR

Hello i've been trying to make a tracking device using the A7 AI-Thinker and arduino UNO.
I connected both of them and the communication in the serial monitor is successful using AT commands.

My problem is that almost every time i type something in serial monitor it will print it wrong so I can't even see if my coordinates are correct and if the project actually works.

I read somewhere that the weird characters could be because of not using 3.3v to power up the module.
but still i don't know.. I'm a beginner , this is my first project .