I've helped dozens of kids and teens build their first Roblox game. Here are the 3 things that trip up almost everyone:

1. Trying to build something massive first.

Your first game doesn't need to be an MMO. Start with a simple obby or a tycoon. You'll learn 10x faster by finishing something small than by abandoning something huge.

2. Ignoring the Explorer panel.

Everything in Roblox Studio lives in the Explorer. If you don't understand the hierarchy — Workspace, ServerScriptService, ReplicatedStorage — you'll be lost. Spend 20 minutes just clicking around before you write any code.

3. Copy-pasting scripts without reading them.

Free model scripts can teach you a lot, but only if you actually read the code. Go line by line. Google what you don't understand. That's how you actually learn Luau.

If you want a step-by-step walkthrough that avoids all these pitfalls, check out the Roblox Game Dev Masterclass. It's built for complete beginners aged 10-17 and takes you from zero to a published game.