There looks to be an issue in the definition of step E. It looks like the location would be the start date.
Don’t forget you can use Ask When Run instead of separate inputs to make the overall entry a little more compact and take fewer taps.
Here’s an example workflow which captures the start date & time, plus a duration, then captures the rest in the event addition itself.
Screenshot of example workflow
Post code may also not be enough location wise. In the UK, post codes may apply to a street or area but do not specify a building. You may want to enhance the location capture by using it to help narrow down an address.