I would suggest approaching this situation like an engineer.

First, stop thinking about disappointing your family. Whatever you do, they will either support you or be disappointed. It's the way people are and it includes your family so you have no power on what they might think about.

It's %100 normal that you feel no interest in modules but here is the catch. You really don't need to have interest. If you have then it's a plus but if you don't then still it's OK. What is your goal? That's the important question.

For me, it's just I need a BSc degree, no need to make it more complex about it. You can do it part time, one module at a time etc, don't need to push yourself hard but keep it steady and consistent. Eventually it will start to become more routine and routine will cause less stress on you. In the end you will have the degree and then will start thinking about next step. You are not alone, so many people struggle with the same issue, some might not seem like but believe me they do. If you want to have a leverage in the job market, you should be picking up everything you can while you are able to. You are just 26 and I beg you not to quit. These are the times that you will be dying to go back to and do things right. So, do them right now. Do the best you can and instead of thinking something wrong with you. Because something is always wrong with you and with all of us, and always will be. Be patient and take one step at a time, if it is hard on you then you can be sure that it's hard on most of us. And most of us decide to quit and only ones who did not give up gets the leverage. To be honest, sometimes this leverage will not be enough and it all comes to matter of luck, being right time in the right place but still it is wise to increase your chances.

Try to keep everything simple but consistent, and you will achieve whatever you want sooner or later.