Is Dedicated sending domain recommeded for new users?

Hi there @Jay001,

Welcome to the Community! Thanks for posting here and hope to provide some info regarding dedicated sending domains and email warming. 

In this case: the decision of when to set up a dedicated sending domain/use one is up to you entirely. You could start one now or wait a bit and establish one later! Whenever you decide to use one, I would recommend reading through this great Community post below. Our great Community Specialist, @Taylor Tarpley goes into great detail about setting up a Dedicated Sending Domain and best practices:

However, to begin actually warming up your sending infrastructure, you would need to warm the domain up by sending actual Live emails to contacts. If you don't have an email list or contacts to send to, you’ll need to build that out first. A guide to warming your sending infrastructure can be found here.

There is also a community post regarding how long the process might take:

Hope this helped!
Alex