On (one's) radar (screen) phrase
If something is on your radar, it is within the spectrum of one's interest, awareness, attention, or consideration.
After receiving many complaints about the service quality of public hospitals, the government finally put it in their radar screen.
I am thinking of buying a new laptop, and a Macbook is on my radar.
Basketball hasn't been on his radar screen.
Used to to emphasize that attention is paid to the individuals who complain or cause problems
Push someone with your finger or elbow to get their attention
Everybody, pay attention to me.
Pay attention to someone or something
Be in the centre of public attention or interest
The origin of this phrase is not clear.
One needs to understand the basic techniques or primary details of something before taking actions that require greater skills
Peter failed because he did not learn to walk before he ran.