Gender reveal

I need help!

I'm a FTM so I have no idea where to begin to plan a gender reveal. I'm finding out the gender but my partner and family don't want to know until the gender reveal. (It's going to kill me) 😂

Anyway, it's only family and a few close friends, we don't want anything big or expensive, so what are some decorations I can get and such to make the day beautiful.