The eligibility criteria for NIMCET is provided below:

• B.Sc. / B.Sc. (Hons) / BCA / BIT of minimum three years full-time from a recognized University with Mathematics/ Statistics as one of the subjects (candidates from open universities are also eligible)

• B.E./ B.Tech. from a recognized University

As you are doing online courses then then also you are eligible because there are provisions for Open Universities which is essentially the same for distance education as well. So technically you can apply for it.

To know more about the NIMCET 2021 visit the link below:

https://it.careers360.com/articles/nimcet-eligibility-criteria

I hope this answer helps. All the very best for your future endeavors!