need help please

I know there are a lot of work, but for now my problem is: I want to create a signal (CARE or sinusuidal) then I want to read the value in a very short time (of the order of microseconds) and then do the same thing in a regular time al using TIMER I am a beginner in programing usually I have an idea but I can not perform under arduino is that you can help me

Start out and learn some programming first by playing with examples in the Learning section.