Obidos to Nazare

For the train, the website is cp.pt. However, the trains to those smaller towns will not be the best. I would search for buses. Flixbus, Gypsyy, and Rede Express are the main long distance bus lines. Each would give an address of where to catch the bus. It likely won’t be a terminal, but rather a bus stop.

Try Rome2Rio or Moovit for information, too.

Rome2Rio gives you good detail
They give a frequent service from óbidos (rua da praça) to Terminal rodoviário de caldas da rainha with https://rodoviariadooeste.pt/

(that checks out- just a local bus service, pay the driver on the day, seemingly)

then a pretty frequent service from Caldas de Rainha to Nazaré, avenida do municipio (terminal rodoviario) on Rede Expressos (which also checks out- book on line).

Those locations can also be seen on Google Maps.

The problem with CP is that the train is every 3 hours and serves a station called Valado - Nazare - Alcobaca (4 miles or so out of town. which Google maps suggests has no local bus service).

That is how I would research such a journey.

Thank you so much. I extremely appreciate it.