Dual Cultivation of a Waste

Yu Rin transmigrated into a cannon fodder waste of a righteous sect that killed him. By a twist of fate, he is reborn to the exact moment when he first transmigrated into the world.
Reborn, he wants to somehow change his fate using the knowledge he has from his previous life... but when he transmigrated, he went into the body of an old man - and almost dead old man.
It is much more difficult to change his fate when every move he makes his arthritis acts up and his bones creak. Any big movements and his hip is displaced.
Thank whatever gods are out there that he knows the treasures of the secret realm, but he has to survive long enough to get there...

"Dual cultivation? That's fine...I guess."

"With a man?!? No way!"

"Wait, I can actually cultivate this way?!"

"I'm not gay though...."

"At least no one knows I've done this...."