Can anybody tell me the best tech stack to start a MicroSaaS that can scale?

I’m planning to build a MicroSaaS as a solo founder and I want to choose a tech stack that can realistically scale, not just work for an MVP.

A bit of context:

• I’m not a developer, but I understand product flows and architecture
• I plan to use n8n for workflows, background jobs, and automation
• I want something:
  • Founder-friendly
  • Scalable (technically + cost-wise)
  • Not heavily locked into one platform

I’m mainly confused about:

• Frontend (AI builders vs traditional frameworks)
• Backend (auth, DB, APIs)
• Hosting & deployment
• Payments & subscriptions