I have downloaded the new audacity to my computer. When I record something the recording itself is very small. I can’t figure out how to make the waves bigger.

Which version of Audacity?
Which operating system?
What are you recording?
What equipment are you using?

I assume you are referring to the height of the waveform (?)
If so, approximately how small is it compared with the height of a track? Half the height? A tenth of the height? …