You don't have to force yourself into being the loudest voice in the room-but you do need to make sure people can actually find you when they're looking for what you offer.
For a lot of quieter, more technical fields, the best marketing happens in the background. A well-written comparison page, a clear set of FAQs, a changelog that actually explains the why behind updates, or just genuinely helping someone solve a problem in a forum they already trust. That stuff adds up quietly, without turning you into a personality.
I'd separate the idea of "marketing" from "performing" too. You don't need video content or a personal brand to articulate a problem clearly, weigh the tradeoffs, and be genuinely useful where your audience already hangs out. That still feels uncomfortable at first, but it's far less intimidating than pretending to be a growth influencer.