It could be quite an interesting experience. You'd be part of a unique fictional world. You might witness the main characters' love story unfold from the sidelines. Maybe you'd get to see the omega and alpha characters interact in their special ways, like the possessive glances of the alpha or the shy yet alluring behavior of the omega. And you could be in the background of all those omegaverse - specific events, like the mating ceremonies or the pack gatherings, which are often full of drama and passion.
It would be quite an interesting experience. You'd be part of a unique fictional world. You might witness the main characters' love stories unfold from the sidelines. There would be a lot of new rules and social hierarchies to understand, like the omega - alpha - beta dynamics. And you'd probably get to see some really cool and different settings that are typical of the omegaverse.
One should stay low - key. Don't draw too much attention to yourself as an extra. Just do what your role requires and blend into the background. For example, if you're an extra at a party scene, just mingle a bit and don't interfere with the main characters' interactions.
One should first understand the rules of the omegaverse. Know the different roles and their characteristics. Stay out of the main characters' way most of the time. Blend in with the background and just observe. Also, make friends with other extras for support.
The key to reading manhwas is to immerse yourself in the story. Pay attention to the details in the art and the expressions of the characters. You could also join online communities or forums to discuss and get different perspectives on the manhwas you're reading.