Apart from making sure my employer sponsor me, anything I need to do for H-1B lottery?

I’m so worried I miss anything from my side… what should I prepare for H-1B lottery? What document do they need from my side? Anything I need to prepare ahead of them so I don’t miss the deadline?? Does companies usually notify you about this and let you know what to do??

Anyone has experience of filing??

Not to worry. Your employer/Your company Legal Entity will take care of your H1B. You only need to keep ready all the documents ready with you, i.e, your educational documents, job experience documents, Passport, existing visa if you have and copy of I94 if you reside in US