Hello

Kindly, could you clarify your question in details so we could help you legally better with pleasure.

Please note that to obtain any work permit, you have to be accepted to work for a company in any European country.
That means that you have to obtain a Work contract before the procedures beguns
That's because you can't do the necessary paperwork all by yourself as many of the required documents and procedures can only be provided and performed by an employer in Europe
You can specify any european country so we can give more details