I'm using Excel and I don't have experience creating macros and scripts.

I need to capitalize the first letter of each sentence, for example:

"Capital first letter only. After Period Should be capitalized only The First Letter"

to this:

"Capital first letter only. After period should be capitalized only the first letter"

How I do that? - a step-by-step will be really appreciated. I'm sorry I'm not a programmer, I just need help.

thanks