@EdelK, you can do the entire Coastal Camino from Porto, all the way to Redondela. It does not actually end in Vila do Conde. The Coastal also has a closely following path called the Senda Litoral, which hugs the coastline as much as possible, where the Coastal Route often goes inland. We did a combination of the two, following the coastline only where it was practical.
The Coastal Route is for those who love the beach, the boardwalks and yet still have lots of other attractions, like old churches, castles, monasteries, etc. There is a debate about whether or not this is a historical Camino, but still it is ever gaining in popularity.
The Central route is for those who want the most historical Camino, with lots and lots of castles, more monasteries, walking on old Roman roads, and so forth. They both join in Redondela. They are both beautiful and fascinating Caminos, albeit in different ways! I recommend you pick one, then come back later and do the other when you can!!
To help you decide, I have lots and lots of photos on my website, of this one, called the
Many Ways on the Camino Portugues. I hope this information is useful for you! Happy planning!