If I could, make a little suggestion?
Focus on building a community around the language, the way Go did, which was masterfully executed:
Newsgroups, conferences, videos, tutorials, more videos, talks, speeches, more tutorials, books, articles, blogs, docs. All of that, churning non-stop.
It's tedious. It's just as much effort as the language itself. I realize that. But it's truly why I even bothered with Go, which is, IMO, arguably a not-as-exciting language as Rust, yet already has amazing library/community involvement and support.