This is about as optimised as climbing a mountain and carrying your fridge up it for a picnic.
I run pretty much everything on my laptop, and I do mean everything including actual AAA games, not just RenPy. It's not amazing but it works. But this is a challenge for it somehow to even cope with the menus... That's not ideal really. Some other RenPy games are like this, really badly optimised where they basically haven't considered potato friendly approaches and it's usually one or the other, potato friendly, or requires a server and a mining rig just to load it.