From my own experience slowly building a followership on Google plus (I worked up from a couple of dozen up to the high hundreds), consistent posting is overwhelmingly the most important thing. Doesn't matter what the frequency is, but you gotta stick to it. I wasn't really trying, but I did make a point of ensuring some activity 'every few days'. If you were a regular weekly visitor you would have seen something new every week. Vital to pace yourself and allow a good amount of slack. Also mentioning and cross-recommending other good posters is a great idea; even if they don't reciprocate (and they probably will), becoming a good 'hub' is highly valuable.
Once things start getting serious, which I hope they will, then it becomes worth setting up automatically scheduled posts and building up a buffer. I never got to that point and as it was only vanity posting I probably wouldn't have worried about it. Even so, if I'd ended up with a really big followership I might have decided they deserved more care and set things up properly.
[Simons] I'm not really sure how to use Google Plus. I have a Google One account. I bought that back when I thought I was going to be home a few months back and had a bit of money.
[pen] I'll have to look for videos that could go with my stuff. That's a good idea.
[KagomeShuko] Google plus is long dead. I strongly recommend doing everything you can to limit your exposure to Google products. They're notorious for killing them off. YouTube and Gmail look all right for now, but I wouldn't count on even them long term. See https://killedbygoogle.com/ for what I mean.