Adding music or sound effects to your recording will really help to bring them to life. You should check that any music you are going to use is copyright free and ok for use within your audio recordings. If the recording is just for personal use, this should be ok. If you intend to sell or give away your recordings then check the copyright on the music.
I have discovered a useful app called BandLab. This enables you to create short tracks ideal for intro/outro in videos and recordings.
Find out more here https://www.bandlab.com/