Did your proposed route just last May, with a group of friends....
Very glad I did it. Wonderful experience! But I'm probably too old/broken down to repeat it. ... Much more demanding than the CF. Would strongly advise against doing it solo!
Lourdes is a very strange and special place -- certainly worth a day's sightseeing even if you're not religiously motivated.... Read and prep for it. ... You'll either love it or hate it.... Lourdes to Oloron is gorgeous green country, and not difficult. Genuinely "Shire"-like! Lots of cows! And the locals were more hospitable than I expected. ... Oloron to Jaca, over the Somport pass, is breathtakingly beautiful, very different and much more daunting than the SJdePP-Roncesvalles mountain crossing experience. ...
Jaca is as charming as any small city on the Frances -- and the Cathedral museum of medieval art there will knock your socks off (if you're into medieval art like me!) It's world class! ... Why it isn't better known, I just don't know! ... After Jaca -- the dry and desolate Aragon country -- find a way to visit San Juan de la Pena, and Leyre, and the Xavier Castle. They absolutely made the walk, for me. ... And give the cathedral in Sanguesa a good long look....
Truth be told, I found that my interest waned after Sanguesa.... If I were ever to re-do the CA, I think that I'd just quit there and bus on over to Pamplona -- my favorite place on earth.
I question the wisdom of doing the CA in July. Too hot/tough for me, I suspect! ... And if you enjoy lots of peregrino company, the CA will disappoint. Like walking alone?
Finally: Stayed in cheap hotels. Am not an albergue person. Glad to offer hotel recommendations based on my experience, if asked.
Vaya con Dios.