You might already have studied Kickstarter meticulously, but in case not, this comprehensive series of Reddit posts by A Lobster gives a good overview over the steps involved in the actual campaign:
https://m.reddit.com/r/gamedev/comments/1k67t0/a_lobsters_guide_for_video_game_projects_on?utm_source=mweb_redirect&compact=trueOf course, figuring out the marketing aspects is crucial to bring in backers. Mark Borbounnaise of Djee Games did a nice report here on TIGsource detailing his efforts with marketing when launching a mobile game. Your game might not be mobile, but he links to lists of youtubers and websites anyone can try to get coverage from:
https://forums.tigsource.com/index.php?topic=49310.0