Add clarifying language to getting started with SDK

Add credits, extra wording to match API key header

Author: DevinVinson

sdk/getting-started.mdx

@@ -35,7 +35,7 @@ The SDK requires an LLM API key from any [LiteLLM-supported provider](https://do
   </Accordion>
 
   <Accordion title="Option 2: OpenHands Cloud (Recommended)" icon="cloud">
-    Sign up for [OpenHands Cloud](https://app.all-hands.dev) and get an LLM API key from the [API keys page](https://app.all-hands.dev/settings/api-keys). This gives you access to models verified to work well with OpenHands, with no markup.
+    Sign up for [OpenHands Cloud](https://app.all-hands.dev), add credits to your account, and get your OpenHands LLM API key from the [API keys page](https://app.all-hands.dev/settings/api-keys). This gives you access to models verified to work well with OpenHands, with no markup.
 
     Example:
     ```bash