First time pilgrim, long time traveller... Which 100km to take?

Hi, I am travelling solo to Spain in early September to complete my first pilgrimage.
I will have approximately 6 to 10 days up my sleeve. I've been doing a lot of research and reading but still can't decide which route to take. I am a long time traveller but only of average fitness, I have done bits and pieces of trekking before. I do want to receive my Compostela and I would like to include Finnisterre/Muxia if possible but I'm willing to do this via bus if I don't have time to walk it. Any advice about the best route for a first timer would be great!

Sarria to Santiago: obviously the most popular route. But will this be overcrowded in September? I know it is historically significant but why the Camino Frances as opposed to other routes? I like the idea of meeting people along the way though!

Camino Ingles: This appeals to me as i would be able to complete the whole Camino with my time constraints. Any advice about this route for a first timer?

Camino Portuges: I have heard this is beautiful and could be a different option. From Porto or Tui? ( In 6 to 10 days?)

Thank you!

Thanks darronb
I'm leaning towards Ingles I think. The timing would be perfect and I do like the idea of it being perhaps less crowded while it's also a complete Camino. Would you mind telling me what helped you decide?

Beun Camino!!