I don’t think that you made a bad decision at all. You would be able to get a job as an Adminsitrator. But you would want to boost your chances by also getting some certifications, Microsoft, Cisco etc.
The last salary survey that I saw (earlier this year) said that starting salaries are around $4200. But I think that the salary would more depend on the type and size company that hires you.
You can also check with your closest Gov’t (Statistical) office to see what IT areas are in greatest demand.