Assalam alaikum. I'm a student from India. I'm 19 years old. And my girlfriend is 18 years old. We have decided to marry after 5-6 years. And she's ready to accept islam to marry me. So can I marry her? And my mother is not satisfied with this. So how do I convince my mother. Please help me.

You can marry anyone of your choice, you are an adult. Go get a civil service. Religion is what screws up the world in too many cases. .