Hi Kunal,
You SLD should be reachable from your current system.
For that update your host file with SLD's hostname and test your connection by opening URL http://hostname:5XX00of your SLD server, where XX is your SLD's instance number. Also make sure the user of SLD data supplier exists with proper authorizations.
Otherwise, you can skip this step for now from the setup.
Register your agent on solution manager.
Use solman_admin or other admin user with password.
Update your host file with solman hostname an IP.
Name DAA is fine.
Regards,
Divyanshu