Which method is efficient for building a community blog, using both devise and rails_admin gems, or just devise?

What I'm trying to build would require having an admin dashboard for me and a users dashboard for other users. At first I was thinking of using devise and rails_admin to develop this feature, but I'm not sure if it's efficient.

Could I simply use devise and have a model for 'admin', for my own purposes and create an additional model for 'users'? Thank you in advance for possible responses.