For shapes:
Step .1: Open Power point
Step.2: Go to insert
Step.3: Click at shapes
Step.4: Pick your shape
For image :
If you are trying for an random image not saved at your pc
Step.1: Open Power point
Step.2: Go to insert
Step.3: Click at clip art
Step.4: Type the name of the picture you are searching for.
"OR"
If you are trying for an image you have in your pc
Step.1: Open PowerPoint
Step.2: Go to insert
Step.3: Click photo album
Step.4: Choose the picture
Hope it helped you
THANKYOU !