Nice to meet you too!
The walk is mostly flat or gentle hills. The only real climb is Alto da Portela, between Ponte de Lima and Rubiaes.
You can find info on the trail and list of accommodation options here:
https://www.gronze.com/camino-portugues
A lovely place to stop is
Casa da Fernanda, in Vitorino dos Piaes. She and her family welcome pilgrims every day, the house is cute and the food is great.
There is no real need for boots. May will start to get warm, so more ventilated shoes would work well. Actually, there are A LOT of cobblestone pavement, so I would highly recommend very comfortable, cushioned shoes. I walked late April with the Mizunos I usually go for walks around at home.