I wouldn't say I'm introverted, but I am definitely also very unaware of social etiquette! But that actually makes me more comfortable interacting with groups than individuals, because the way I see it, in a large enough group chances are there's someone who will defend me or at least internally sympathise with my foot-in-mouth syndrome and not assume the worst, whereas interacting with one person is very swingy; they either disapprove of you or they don't, and being disapproved of with no-one to back me up is way scarier imo :'D
In my experience at least, online communities don't seem to care about arbitrary, unnatural rules as much as people irl. I find it quite different from politicking around at uni/work/family gatherings, which is definitely not fun for the reasons you mentioned.
I think the thing that makes it worst for me though is the high stakes involved; there's more pressure to following the rules if the people you're talking to are keeping you fed, or have your professional reputation in the palm of their hands.
I guess this is no different if you want to be a professional comic artist as well, and want to be seen as reliable as well as good. But I think (in this day and age, at least) you can still get eyes on your work without caring that much about professionalism, which eliminates some of the stakes. In a low stakes interaction, it's safer to stand up for what you believe in and refuse to follow pointless rules. In fact, I think a good number of people would respect you for it :]
I think that's the most effective form of promotion anyway! In fact, there's a lot of people out there who give creators crap about not being 'genuine', so forced promotion might sometimes do more harm than good (even though I personally don't condone that attitude; it's one thing if they're being spammy, but I don't like calling people 'fake' for sounding a bit awkward or stilted.)
I've actually always thought of regular updates as a content creation thing rather than a promotion thing, but I guess the whole point of it is to get the algorithm to show your series more often, so it actually is a promotion thing after all XD ... Okay, I guess I hate promotion more than I thought 