if you want to create shorts then their is 2 ways to create shorts

open youitube on your mobile phone then click on shorts section

select music according to you choice and click onΒ create then phone camera willΒ opne

then start creating yt shorts. now swipe the story to see the easy way to create shorts

first select song according to your choise

then select 60 seconds of that song

then start createing shorts

after creating shorts then edit it properly according to youtube shorts policy

then upload that shorts on youtube

I hope you will understand both the ways of creating shorts