Siva,
Which PSoC are you intending to work with?
You mentioned PSoC Designer which is the PSoC1 IDE (Integrated Development Environment). If you're interested in PSoC3, PSoC4, PSOC5 or some PSoC6, then you'll need PSoC Creator IDE.
Are you familiar with C Language basics?
If not, here is a link to C language tutorials: https://www.learn-c.org/
Once you have a good understanding of C language syntax and intrinsic functions (like if(), while(), do(), for(), etc) then I recommend if you don't have a Infineon/Cypress kit for a PSoC that you acquire one.
Along with the kit, you can download freely available example programs to show you working instances of one or more PSoC features. Having a working example on your kit, you can try modifying in C to accomplish different or additional functions. With good understanding it may be possible to combine multiple example projects into one project.
Len
"Engineering is an Art. The Art of Compromise."
