Focus your first project on something you enjoy yourself
Another suggestion, based on my own journey, is to focus your first project on something you enjoy yourself, rather than trying to hit some as-yet-undefined-target audience. Burn out is very real in this thing we do and if you are making something that actually excites you, rather than just trying to check a box on your dev schedule; then you have a much higher chance of making it past the V 0.01 preview. Source.
Choosing a realistic level of ambition
Choosing a realistic level of ambition for a project is the most important decision early on. It will make or break everything in the end. Unless you're only interested in developing a shitty cash cow to sucker in the "it will eventually be amazing" crowd on Patreon, scope should be front and center in your mind. Source.
The timing of posting images needs to be correct
The timing of posting images needs to be correct. Posting a image on a Monday morning is never going to get a lot of likes before it's buried. Keep timezones in mind, both Europe and America are the biggest audience here." This is something I certainly pay attention to. Like when I post sets to here or DA I will post them in late afternoons/early evenings. Same goes for when I post to Pixiv (glad I bought the account upgrade for scheduling that). Most of the time I'll wait till the later half of the week if not the weekends to post full sets. One-offs I'll keep with similar clock schedule but will post any time during the week. Source