Yes. Using AEM and DTM together is pretty straightforward. Just add the embed codes in your templates to get started. You can also use cq_analytics properties in DTM Data Elements for added data layer flexibility.
There is not a one size fits all answer here. Based on other cases we have seen it is not a huge ordeal to do this. There are many features within DTM that let you handle the migration into DTM. The new integrations and the core services layer that includes the master marketing profile and the ease of maintaining all of your tracking in one system will far outweigh the process of the migration.
For more details, reach out to your account manager to setup a call to discuss this further.