What to study for switch as java dev 2yoe?

Hi All, I am in java support project want to switch company as a java dev so what should i study and gain skills which will make my resume better? I know java and spring boot but I am not getting opportunities n calls from other companies. Also I am not having much to write in experience section as working in support project and currently i have digital profile what salary should I expect when asked as expected CTC. Can someone please guide.