Looking at the modelBuilder process, I would suggest to start with a Filegdb reader and select only the feature types you want to write.
You can add a DWG writer and output what you read to a DWG-file.
For adding and deleting fields, as well as setting attribute values I would recommend the AttributeManager.
Depending on the filter you apply in the select step, you could either use a AttributeFilter, a GeomtryFilter and/or a TestFilter.
For writing I think you use a Filegdb again, so you'll need to add that one as a Writer as well.
I hope this helps you to get the first steps done.
Dear lars_de_vries,
Thank you for your answer. I need to transform file from AutoCAD
to feature class in ArcMap, so I started by adding AutoCAD reader and I need
all the layers in AutoCAD file to be transformed. I’ve updated the model as the
follow screenshot. May be now it will explain better what I need.


Cheers,
Rawan