Hey there

If I was to travel from Amsterdam to Berlin, then from Berlin to Treviso/Italy...Then back to Amsterdam via Paris and Belgium- would it be worthwhile buying the Eurail Pass...We would need about 5 days on the train altogether...Would we need to reserve seats…? Are there trains going this route…? Can I purchase the pass when we arrive in Amsterdam…?

We are doing this trip from 9 December to 30 December 2023 so do the trains run during this time…?

Thank you for any help and advice...We are 2 adults...