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Ok, you can edit them.

I recommend you edit them.

I also recommend creating new posts.

Don't worry about stumbling, it's normal to start.

I advise you to read about the uses of Steemit for you to be successful.

I will leave you this publication that I create, I hope it will serve as a guide: https://steemit.com/hive-172186/@inspiracion/eres-nuevo-en-steemit-te-invito-a-leer-reglas-basicas-para-tus-publicaciones-empieza-con-exito-en-steemit (It is in Spanish, but you can use google translator)

Any doubt I'm here to help.