Proper Etiquette for Asking Help as an Intern

I'm not familiar with Meta-specific dynamics, but the approach sounds reasonable overall. If it's a question that others are likely to face as well, you might document the solution or otherwise disseminate the information you received so it's not just you benefiting from the question answerer.

In terms of asking for help in general, I think it's critical to 1) provide the full context for the problem you're facing 2) describe what steps you took yourself to try to solve the problem and why they didn't work. Whoever you're asking for help is probably going to ask you for 1) anyway, so you might as well be preemptive and save both of you time by providing that context up front. Context is also incredibly important for giving you the right answer to your question. 2) is important because it demonstrates initiative, and people are more likely to help if you show that you tried to unblock yourself independently vs. immediately ask to be spoon-fed the answer.