Your safest bet: Paramount+ (US), TNT Sports (UK), or a local sports bar. But if you want adventure, try a PSG-supporting cafe in your city. The banter is worth the price of a croissant.
Or, do what I do. Invite friends over, buy snacks, and argue about who has the better haircut. The match is just a backdrop for the chaos. Who cares where you watch? You just watch with enthusiasm.
Now go. Find a screen. Get loud. COYG or Allez Paris. But above all, have fun.