Job hopping after u gain experience from you company is definitely great to improve your base salary.
Always put in to consideration the room for improvement in your current department.

Back to the topic, getting 1.8k for a fresh graduate is quite average considering many good advantage for you. Like getting MNC exposure and additional experience to show off in your next interview.
FYI, MNC company pay higher salary to the agent coz all the medical fees are covered by the agent. Thus, the agent usually leeched 20-25% of your paid salary.
Good luck