They say it's the journey, not the goal that matters. Having achieved everything you ever wanted sounds kind of scarry. But there's so much stuff you can do. How about helping other people or our planet? Doing some charity work or environmental projects?
My side project is a blog and I use social media and SEO mostly. I also share my content to relevant groups (ie Facebook groups, Linkedin groups) and forums. I did some paid ads too, mostly od Facebook, but invested very little money so it didn't bring much traffic.
If you browse so much you can start by curating content. Something like: 10 best articles on influencer marketing - a link and short intro to each of them and you have a piece of content of your own. Curating valuable content is many times as good as creating it.
I started selling clothes through print-on -demand platforms. Didn't earn much yet, but didn't put much effort into it either. I even got featured on the Modsly platform blog as a success story which is kind of cool :)