Esp-01 not sending data back to arduino uno (AT commands)

I just got an esp-01/esp8266 mini and i have been struggling with using it with the arduino uno. I dont have much experince with WIFI-modules and there aren't many tutorials. Help pls!!
I followed some tutorials online with no fruit. The esp-01 led blink as arduino sends the AT command but ESP-01 does not respond.
Here is a link to the instructable tutorial i followed:

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