

Tbh I think Consider Phlebas is one of the weakest Culture novels, so I’d absolutely give Player of Games a shot! I started with that one, and it does a much better job at showing The Culture’s society than the mere outside glances we get from Phlebas.
With the possible exception of Phlebas, I recommend going through the series in publication order. But feel free to skip Inversions and State of the Art, imho they both mostly suck 😅 The rest of the books are great :)
Tbh the Matrix never made sense from that angle, metabolism uses more energy than it generates. I think the original script said humans being farmed for their brain processing power, not body heat, which would have made marginally more sense. (Also why not just keep people in a coma in either case; anyway I’ll stop poking at Matrix plot holes 😂)