I would say either start in La Espina or Tineo, there is a regular bus service from Oviedo to both places, probably the same bus route. I walked it in 2012 and 2014, the 1st time I gave up in La Espina because I had hurt my knee, I felt that the 60 km I walked up to that point had a lot of hard flat surfaces. In 2014 I had started way back near Montpellier, I had a very sore, painful, tender right heel and arch, I learnt later it was plantar fascias. I could just about tolerate it until half way through the Camino Aragones I realised that the flat hard surfaces I was encountering and soon to be CF would be too much for me. I jumped to Leon and walked to Oviedo and on to the Primitivo. Even through the pain never went away I felt the stages after La Espina were probably the best surfaces overall I could walk, not perfect but not overall too flat and a bit rough, which was good for me,the only real tough sections is the 10 or 15 km lead into Lugo which has a lot of asphalt and the sections after Lugo which despite all the people who rave about the way to Melide or the turn off to Palais de Rei, they can't have had foot problems because it is virtually all hard surfaces/asphalt. I don't know about the ways to Sobrado on the Norte, there is supposed to be a green path and people have wrote about it on here, but it is possible recently that a landowner has taken away some access rights.
Buen Camino[
I would say either start in La Espina or Tineo, there is a regular bus service from Oviedo to both places, probably the same bus route. I walked it in 2012 and 2014, the 1st time I gave up in La Espina because I had hurt my knee, I felt that the 60 km I walked up to that point had a lot of hard flat surfaces. In 2014 I had started way back near Montpellier, I had a very sore, painful, tender right heel and arch, I learnt later it was plantar fascias. I could just about tolerate it until half way through the Camino Aragones I realised that the flat hard surfaces I was encountering and soon to be CF would be too much for me. I jumped to Leon and walked to Oviedo and on to the Primitivo. Even through the pain never went away I felt the stages after La Espina were probably the best surfaces overall I could walk, not perfect but not overall too flat and a bit rough, which was good for me,the only real tough sections is the 10 or 15 km lead into Lugo which has a lot of asphalt and the sections after Lugo which despite all the people who rave about the way to Melide or the turn off to Palais de Rei, they can't have had foot problems because it is virtually all hard surfaces/asphalt. I don't know about the ways to Sobrado on the Norte, there is supposed to be a green path and people have wrote about it on here, but it is possible recently that a landowner has taken away some access rights.
Buen Camino
Walked the verde in september,and loved it. It was well marked all the way. Went to lavacola and avoided the Francis completely. It also wad well marked from bortimoro to santiago.