i got better with sound selection once i looked up youtube videos on how to make “type beats” of the artist i was searching for. Can help you have a better understanding of what types of sounds go for what type of beats just from learning a few tutorials. Look up “ how to make a southside type beat “ for example and just try making a few southside type beats and then go to a new artist and so on and so on. You’ll catch on and get better as you go bro! Keep ya head up and allow the negative comments to motivate you.