This was generally true before the introduction of YJIT, but with YJIT, Ruby's performance has improved significantly and may even outpace Python in some scenarios[1].
Second the recommendation for the Bobiverse series; it's a fun series and I'm looking forward to the 5th book.
Also Andy Weir's Project Hail Mary is an excellent read!
[1]: https://benchmarksgame-team.pages.debian.net/benchmarksgame/...