Will I be able to see the charges incurred daily during the free trial?
Charges are not broken down by day but are displayed as a cumulative charge from the most recent billing cycle.
Usage calculation is based upon the number of created instances and billing units are per hour. Usage billing starts after initialization of the cluster, even if the clusters are not in use (running state). This can be avoided by terminating the unused clusters.
You can see your usage under the Account Tab on the CDS billing page under Usage.