I have good enough knowledge in java and spring boot not at all proficient in DSA, I want to give myself 4 months to work on my ds and algo, and to brush up

I have good enough knowledge in java and spring boot not at all proficient in DSA, I want to give myself 4 months to work on my ds and algo, and to brush up spring boot and java. 
Which companies should I target if :

1) Got confidence in DSA and spring boot
2) Got confidence in basic DSA array stack queue linked list and spring boot
3) Got confidence in only spring boot and backend development 

And what should I expect as ctc in each of the above possibilities

I have 1.8 year experience, with a package of 9-10 lpa.