my iphone memory is almost full what can i do to create space for more data?

First go to

Settings, General, iphone storage

Show all recommendations and act on them.

If you cannot delete any more then increase your free 5GB iCloud storage and either move non-media data to iCloud Drive using Files App or turn on both iCloud Photos and optimise storage in the above settings.

To increase iCloud Storage go to Settings, tap on your Apple ID banner right at the top of the screen, iCloud, Manage storage, Change storage plan.

Use this in conjunction with my post above.