I read your posting after I had already sent my reply to another Ziner, so
I think you can refer to it for your needs.
Yes I've been to Portugal three times and I loved it !
I visited all regions of mainland Portugal excluding Tras-Ús-Montes.
If you need more suggestions for your southbound part of the journey( you
can visit the coast or , if you have more time, the mountain range
east,towards the spanish border and Alentejo), let me know.