that's the background noise of your ambiance...it's perfectly normal!
if the noise is too much and your recording will be ruined, try to low the input level of the mic and put the mic closer to the sound source (your mouth or rhe instrument you will play)...this way the sound you want to record will be more loud than the background noise.
you can always clear it a bit, take a look to the reafir video by kenny gioia