You can run docker swarm easy peasy. Its not that trendy, but anyone can manage it, and you can migrate to k8s later if you need to. Of course it doesn't do some of the things that k8s does, and thats why its less complicated...

Edit: you can run a lot on one or two hetzner servers for almost no money. Compare €60/month, vs about $1000/month for a couple of replicated fargate services.