Advice about moving to Belgium?

I have fallen in love with a Belgian and we are thinking about marrying next year. I need some advice. The man I am marrying is receiving incapacity benefit and we are unsure how getting married will affect his benefit. I am working in the UK but of course will not have a job when I move and will be looking for one. I am in the process of selling my house so will have some money to start me off. I am interested in retraining, I do have a degree but feel I want to make a fresh start with a new career. Where can I go to get information about the questions I am asking? Would I be entitled to help with retraining or any benefits if I cannot find a job quickly. I am currently working hard to learn Flemish and Dutch but really need some detailed information about benefits etc Thank you helen