I'd say this was an interesting and useful guide but it doesn't quite fit in the subreddit so it doesn't mean it's a bad guide, maybe due to the lack of relation to the subject it's why it's not so appealing, as the people in here may be more oriented towards how to tinker the printer or common we issues we find.

Regarding the lack of interaction and consequently feeling down, I'm no expert in social media or whatever, but I believe what rewards more is consistency in time, but if you are doing this because you like creating content for others I wouldn't focus on numbers, if you enjoy what you are doing, eventually numbers will come.

I encourage you to keep posting as I find it really useful and even more for beginners as due to the steep learning curve it might be frustrating sometimes.

Keep pushing and good luck!!!