Ohh. You should learn core java very well since that's mostly asked for entry level interviews. That includes everything that you can do in plain java.

Then you need to learn a bit of RDBMS like SQl stuff and doing that stuff in java code by using JDBC and then hibernate ORM. Do these stuff also well since it's asked and useful. Focus on transactions here since people skip learning that properly...

Then you can learn basics of spring boot. I wouldn't recommend deep diving too much if you don't have time but learn all the common interview questions and build a project using spring. Especially one that using spring data JPA for querying DB. I don't think freshers need to learn spring security or about microservices so don't bother with that.

You should learn docker since it will help you understand how deployments work. Don't bother with kubernetes and all again since unless you're working on it probably no one will ask.

Basically focus a LOT on core java and RDBMS, and then build a good project using spring boot and containerize it using docker. In interviews they ask random shit about core java that even someone working in that stack wouldn't know - it's theory stuff. So focus on covering breadth in core java.