36 years of Age, should do Bsc or Msc ?

[sialiblo]

It doesn't have to be sequential BS then MS, you can get MS without BS at all, or you can get MS first and then BS some time later, depends on what your objective and urgency is.

CU Boulder in Coursera has 3 masters: Data Science, Engineering Management and Electrical Engineering, all of them doesn't require BS degree, you just need to finish pathway course to get admitted. If your interest is into IT/analytics/data science, then MSDS is the closest to your interest