the right route

Hi kittypoppy, you can find information on this site: https://www.gronze.com/camino-norte

If you don't speak Spanish the maps etc are still very helpful. There's a list of accommodation provided for each stage. If you want a more detailed description of the walk and distances you can click on the "Recorrido" tab (although you might need to copy/paste the text to Google translate).

The pilgrim albergue in San Sebastian is only open in July and August. To secure accommodation on your first night, your best option is probably to look for a hostel or cheap hotel on booking.com.

For the stage from San Sebastian, you will walk along the famous shell-shaped waterfront (the "paseo de la Concha") and then continue following the yellow camino arrows once you get to the end. As long as the sea's on your right, and you're walking westwards, you can't go too far wrong.