It's like the butterfly-wing theory: You never know how large the impact of what you're doing actually will be. Even if there are only a few readers of an article/tweet, it might be exactly the one, you've been waiting for ;-)

So, if you're able to make a german version of that Beatles series in a reasonable time, you should definitely go for it! Personally I think the gender mistakes would not harm your message in general. It even may give your posts a personal touch (when you mention you're not a native speaker).

Thanks for the tip regarding boosters. As I consider myself being an dolphin, I just didn't want to drain the reward pool too much (so that minnows can also get a piece of the pie). As everybody else is using boosters these days and as I want to support some overlooked posts, I will have to look deeper into it, though.

Looking forward to your German posts and have a great day!