How to obtain EVP messages

It's different for everyone. Some use the Wavepad app on their smartphone some use the Audacity program on their pc or laptop. You record directly with the wavepad with Audacity you use any digital recorder and transfer the file to the audacity.  Or you can record directly on the Audacity too. As for background sounds. People use water, fan, parakeets, crickets, cats meowing or gibberish. Pretty much anything you can think of. Some even use foreign languages. They need some kind of background sound to form words with. They have to learn also so if there's someone you want to connect with then tell them to learn. Braden teaches this in the big circle but there's many who teach it there. As for you don't give up. This takes time for both them and you to connect. You have to play around with the settings on the Wavepad and audacity to learn how it works. Whispers are very soft in the beginning and hard to discern. It takes hours to go over one 5 minute recording. In time you'll begin to hear them better, being a medium helps too. If you aren't or aren't sure if you are there are ways to enhance your natural abilities.
I've also recorded a voice video and it's on my YouTube channel you can find a link to it in one of the posts here on the blog.