1.Press and hold the home key until google appears.
2.Search for gmail, log in and update if the option appears.
If not, go back and search play store and update gmail as well as google services.
Note: your phone will switch back multiple times back to initial set up pages. Repeat first step as it takes you back to google and play store.
3.After these steps are done you can go back to initial setup. You should be able to move forward.