Hello @lovesniper
Thank you for the kind welcome and the advice :-) I'll be sure to check those communities out.
About copying my existing content: Since it's already on my own blog (that I intend to keep going) and it's also content that I think/hope people here will like, I was going to crosspost them here, but I will change the format (since I have a three column layout on my blog) and use higher resolution images without watermarks. I may also slightly rewrite them where appropriate, so that they take on a unique "flavor" here and aren't just copies of my existing content.
As for old, the blog is pretty new but already has lots of content. I spent the last two months writing about all my hikes of the last three years and backdating the posts to the date of the hike.
Do you think that's Okay? Alternatively I could just share my favorite pictures without copying the stories, or with short summaries, but since I've already written those stories, they're bound to be very similar even if I write them anew.
For the future I was planning on crossposting on my blog and here. The hiking blog is ad-free and not monetized by the way. It's just a pet project of mine that I'd be very reluctant to abandon now.