Gst implications for new propritorship

I am considering starting a small business of handmade jewellery that I plan on selling pan India. since interstate business is expected GST registration is mandatory... but as I am staying with my father, I shall not be able to produce an NOC from the landlord and rental deed for house is in my father's name. What can be done to overcome this drawback? At present I am not I a position to take a business premises on rent for the purposes of business.

Also I was providing content writing services 3 years ago but had stopped due to personal reasons. What are the implications for this? if I need to register then can I take a single registration for both supply of goods and services? What are the implications?