I’m offering ElfHosted *Arrs for 80% off ($0.01/day), see https://elfhosted.com/blog/2023/11/24/blackflagday-2023-deal/
If you’re wanting a learning resource (rather than having it “Just Work”), may I offer https://geek-cookbook.funkypenguin.co.nz/docker-swarm/ ? It’s my opinionated process on building out a swarm, much like you describe :)
A spin on Black Friday, emphasizing products ending in “Aaar”, like a pirate would say. Because pirates like black flags :)