Alcohol (ena) production under gst

We are having a distillery unit for producing ENA (alcohol) from grains

the existing laws of VAT & EXCISE will continue for alcohol products, it seems

are we require to register under GST

we deal with raw materials, coal and rice which are under GST and our biproducts sale (flyash, CO2 and DDGS) are

also under GST

Also, are we eligibile to take input credit on plant and machinery we purchase (capital inputs) What about ED paid on input purchases of capital goods

please advise