For change in objects, the following are the steps, if the new objects are in sync with your company name:
1. Hold Board meeting for approval of changed object and for notice for holding GM and authorise one director or secretary to deal with RoC in this regard.
2. Hold the general meeting and pass the special resolution.
3. File form 23 with ROC with amended MoA for registration of SR u/s 192.
4. Get the form registered and get a certificate for registration.
if the new objects are not in sync with your company name:
In case the new objects are not in sync with your company name then first you have to apply for availability of name in form 1A and after taking the name availability, you can pass the name change resolution as well as object clause amendment resolution and then on file form 23.
For the inputs regarding your NBFC status wait for others comment.