Sybase to SQL Server Migration(Architect Role)

Question

Hi,

Right now I am working for migration from Sybase to SQL Server. Currently there are batch jobs, Access 2007 databases(.accdb) pointing to Sybase(having tables and stored procedure there). We are in plan to migrate all thease sybase stuff to SQL server. Can you please guide me what should be first step for me to initiate this process? 

I look forward for your joyful reply.

Thanks,