Composition to Normal

You Can Amend It With "Application For Withdraw Composition Levey" Under Registration Tab

Yes, You can change.

A composition tax payer who wants to become a regular tax payer should file an intimation for withdrawal from the composition scheme in Form GST CMP-04.

The person moving to the regular scheme has to furnish a statement in Form GST ITC-01 containing details of the stock of inputs, inputs in semi-finished or finished goods held on the day before the date on which he becomes liable to be a regular dealer. Furnishing of Form GST ITC-01 enables the dealer to claim ITC on inputs, inputs in semi-finished or finished goods and capital goods in stock when he/she becomes a regular dealer and it has to be furnished within 30 days after filing Form GST CMP-04.

It's not mandatory to file ITC 01 , yes offcourse is you wants to claim ITC on Stock , Capital Goods need to file ITC 01

You can change to Normal Scheme from Composition Scheme.