Dear Manoj
In addition to suggestions given by other experts I would like to suggest a grand strategy developed by German psychologist Vera F. Birkenbihl especially to learn German.
However same strategy can be used in learning any language
There are broadly 4 steps to language acquisition according to Birkenbihl
Step1.Understanding the meaning of the word
Step2:Active Listening
Step3:Passive Listening
Step4:Futher Learning activities
Chorus Method
Shadow Speaking
Fill in the blanks(Speaking)
Dictation
Fill in the blanks ( In Writing)
8 pages document of the entire procedure is also attached as an input for your understanding!I am sure you will amazed at your progress in next 180 Days!!
Warm Regards
Indranil Bhaduri