The simplest way to make footstep sounds.
First, you have to make a sound cue out of your footstep .wav file and create a node looping between the .wav file and the result.
Then go to your BP_FirstPersonCharacter, and make a W key node, which you are going to need to connect to Spawn sound 2D with out of Pressed. Also choose your sound cue on it. Out of return value, only return value, make a Stop node. Connect released exec from W key to Stop node.
The result should look like this:
Let me know if it helped anybody new to this! I just know how hard is it to begin the journey myself!