Every camino is different but I thought the CF was a totally different experience to the CP. The CP is much quieter than CF.
Can’t advise on flights - if you fly into Lisbon it’s easy to get the train to Porto.
I would do some research on routes and take a guide - from Porto I did the coastal route to Caminha then Tui, Pontevedra, Padron. I was super surprised how many people turned up in Porto without any info. At Vila do Conde my
Brierley guide was hot property and photographed many times as people tried to work out where to go next.
The coastal route is dead flat which you might/might not find enjoyable. If there are strong winds coming off the sea I should imagine it’s *really* hard walking. There are 2 coastal routes and I was confused at times, I think one is basically along the sand the other is slightly inland. For the inland one, in places you are walking along the road between maize fields with very little to see (in August).
There aren’t anywhere near as many pilgrim bars, pilgrim menus and pilgrim ‘stuff’ along the route which might be a good/bad thing depending on your point of view. Portugal is very different to Spain, it’s not such a late night culture, you don’t get food when you buy a drink but that makes the drink very cheap
, the people I met were really wonderful and very friendly.
I traveled in August and from Porto I stayed mostly in inexpensive hotels. A fair few people I met walking from Lisbon had already booked accommodation in advance from Tui for peace of mind. I suspect if you are walking later in the day albergue accommodation in places like Pontevedra might be difficult. I have only my experience to go on but very few, if any, people were up at 5/6am. (People did from Libson but that’s because the stages are very long and everyone was trying to avoid the 40+ degree heat). I thought the CP was much more relaxed.
One of the unique things about CP is that you will meet people the other way walking to Fatima and you need to get used to the blue and yellow arrows.