Can I get more Storage

you cannot expand the storage capacity of an iPhone.

Depending on what is taking up your space..

How to check the storage on your iPhone, iPad, and iPod touch - Apple Support

If you have a bunch of pictures taking up your space, you could use iCloud Photos and a lower resolution image would be on your phone, thus saving some space (Optimize Storage option)

Set up and use iCloud Photos - Apple Support

If you need more than the free 5 GB: Buy more iCloud storage - Apple Support

Or you could back the photos up to a computer and remove them from your phone..

Transfer photos and videos from your iPhone, iPad, or iPod touch - Apple Support