[Koha] A question

Hi!, I'm a librarian and I work in a university library in Uruguay, South America. We are interested in working with koha. Now we have CDS/ISIS with Cepal format. We have first to change the databases format from Cepal to Marc. Is there anyone who have already done this?. I will really appreciate any previous experience, Best regards, Lic. Laura Ferreyra ORT University Central Library