regarding new gst Registration​

Dear Shine if your supplies are covered under GST, then you have to take new GST registration.for full procedure plz read articlehttps://www.gstsoln.com/new-registration-migration-gst/

Further if you doing export of Goods  not covered by export duty, then 90% of itc will be refunded on provisional basis.. For this you should not charge IGST in your export invoices.