WINSYS is good. There are quite a lot of institutes , it all depends what subject you want to learn.
Go for Marketing or Accounts . Computers you have be updated every six or twelve months. It is hard if you are old. Young people will have more knowledge than you. It is better to be a doctor or any other field.
Do a CIM in marketing , CIMA in accounts and learn BBA or MBA. You can sit in the board of directors.