Looking for a nice beautiful route somewhere in Europe

Hey everyone!

I'm looking for a route that is roughly 600-800km, that can be run in about month in Europe.

My trip is planned for around May/June so ideally the weather also works during that time in the region.

My problem is that I have to do it solo and as I don't have the best camping equipment and due to logistics I think its wise that for the first time I do something like this, I want to travel from town to town and sleep indoors. Either at place from Hotshowers or in Hostels etc.

I'm currently not set on a route, I thought about Nice to Barcelona as it is along the coast and should be really beautiful and there is also a lot of infrastructure along that coastline, or the Camino del Norte to Santiago de Compostela as that should also have good infrastructure due to pilgrims.

I'm open to any recommendations, the route shouldn't be too hard elevations wide, not because of the fitness toll, but I'm not really experienced in the mountains and I don't think it would be responsible for me to do too technical trails high up on such a long journey. Even though I would enjoy some mountain panorama.

I'm sorry if I forgot to mention something important and looking forward to any route recommendations/other tips regarding the journey.