Hello - I am a single woman in her late 50s hoping to walk (solo) from Lisbon to Porto and meet with friends to continue on to Santiago. I have been advised that the Lisbon-Porto section is not the safest for a single traveller. I've been told there are thefts and exhibitionists along the way. I was cautioned against walking alone. I am not planning to walk until next year (2022), but I am starting my plans. Can anyone advise? I am an experienced traveller.