Ditto.
Once you get to the terminal, there are plenty of signs and people to direct you. And once inside, there are CMs to point you in the right direction. There's also a photo opportunity. And another just before you board. Once on the ship, more CMs to assist if you have questions or get lost.
We've NEVER had a bad experience on a Disney cruise. And I'm taking my 7th & 8th this year. Problem is, as soon as you get off, you wanna go again. So do the placeholder before you disembark.
Don't stress, you'll have a fantastic time!