HELP need to make a 30 second animation for my school project and I only have 2 seconds

a precise question will get a precise answer, but to stretch out 2s to 30 is quite impossible, except if your 2 s is something you can repeat.

Anyway, nobody will do your homework here and the level of information that you gave us is so low that you even can‘t expect qualified answers.

You don‘t say which Adobe product you use, you don‘t tell about the style of your animation (your name suggests 3D) you only tell about the length. So my tweak advice would be: Simply add 28 seconds.