Where we can see ledger and delete products?

Ledgers list will be available soon. You can create ledgers as of now, there is no option to edit ledgers as of now.

You can add and edit products. You cannot delete an already added product.

The reason a product is not allowed to be deleted is that, in case you have issued an invoice for that product then even the invoice will get deleted. So, the option to delete product or customer is not provided and in future if technology allows this will be provided.