Hey @Gelo! Great question, and I totally get why that prompt made you pause.
Don’t worry - this won't create any charges. Figma for Education gives verified students and educators free access to the Professional plan, and that includes Full seats. There’s no billing on an Education plan, so Seat type is simply controlling what you can access and not what you pay. If your account on that team wasn't already assigned a Full seat, the system prompts you to request the upgrade - for verified Education users, that upgrade is automatically approved and free. You've already clicked continue, so you should see Figma Make become available on your account shortly, if it isn't already.
Can you confirm whether Figma Make is now working for you? If you’re still getting prompted to request a seat, or if you do see anything billing-related appear (like an invoice or payment prompt), let me know.