First of all let me appreciate you on taking up family farming job after passing B.Tech.
You say "it goes well ". I would suggest please use your education and B Tech knowledge to make it better.
You are having some debt. If the debts are of high interest and from individual, consolidate all of them and have it from a nationalised or rural or co-operative bank popular and established in your area. Take agricultural loan or cash credit at a low interest as applicable. Discuss details and make the repayment realistic to avoid default.
You need a change. You can have it. You may take up some self employment business, that can be carried on from home. You may also take a loan, id needed for that under self employment scheme or Mudra scheme.
In case you need to enhance any skill, you can take up some short term diploma course during the non-busy season in farming.
I can say that you are blessed because not all engineers get a chance to take up family profession, not all are lucky to be with their family and friends. I can suggest you may thank God for this blessing and continue in the same activity taking efforts to improve the yield and earning by bringing better technology, by taking help from government agriculture department or agricultural university.You can take help of the fertiliser companies which sponsor such activities for research and advertisement. You may also take up a suitable self employment which you can do along with your farming activities. If possible select one where the other members of the family also can involve and help you.
You can take up some online marketing, online teaching or even take up blog writing on farming using your experience. There are any number of opportunities, but I will repeat that do not relinquish the family farming, by which you are not only serving yourselves but the society also. That is the real production.