You said:

1. Go to Business overview and select Reports. Select the Custom reports tab.
2. Find the custom report on the list.

In the Simple Start version, the custom reports list is empty.

You also said:

1. Go to Reports.
2. Type Transaction List with Splits in the search bar.

There is no "transaction list with splits". 

You haven't addressed the issue with the "description" field not showing in the transaction report. Only the contents of the "memo" field shows.