Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Zubair ahmed
yes you can do phd as you are eligible candidate. but for the course work you have to take leave from your job as it is on regular basis. further more is depends on the relation between you and supervisor. for admission check website of different universities some requires research proposal to submit and defend it in interview and some only conduct interview. attandence is mandatory in research course work.
most of the central universities exempt candidates from entrance exam of phd on basis of net. if you are jrf then also exempt. IITs and IIMs only conduct interviews but they require full time phd scholars. it means you have to take leave for entire phd for IITs and IIMs rest central universities requires you to be regular in course work if you have good setting or relation with your supervisior everthing is posssible.