Anyone starting 15th of May from Lisbon? Where to find train timetables? etc ...

mornin, have never walked the Portuguese Camino, however I do live in Portugal so I can tell you that you can get all train time tables on the site : Comboios de Portugal. Upper right hand corner is the english option. I have found you cannot schedule anything too far out. I am sure you will receive a whole slew of suggestions for albergues shortly. Bom Caminho

I walked from Santarem to Porto last Oct on the central way, took a train there as was time-limited, that is 3 walking days from Porto. There are albergues all the way to Porto now, only in Tomar there is a hostel, in Santarem and Sao Joao there are Casa de Misericordia that are simiral to albergues. You can also stay with bombeiros (firemen) but now there is no need for it. Those with whom I walked later told me they stayed in albergues all the way from Lisbon, so there is no need to go back and forth. By the way there is also a new albergue in Lisbon as well. See details here: https://www.caminodesantiago.me/community/threads/new-albergue-in-lisbon.53635/#post-59691
After Porto the infrastructure is great, you can either continue on the central way or go along the ocean. The comprehensive list of albergues: http://www.vialusitana.org/caminho-portugues/albergues/ I found the route well marked and relatively easy, apart from stages before Coimbra where I had to walk 30+km every day.