VPN enough for Anonymity on Nostr?

I joined Nostr yesterday, and its going well. I don't use bitcoin and don't plan to do so in future. Just using Nostr for micro-blogging. After research for few minutes, I concluded that Relays might store my IP address, is that all? I can use VPN or Proxy for that. I don't zap or receive zap, I also don't use Alby.