I want to create a nested style, which I could apply to all of the first uppercase letters within the paragraph. For example: "Joe goes to school. Lara works at home. George sleeps a lot". I want those first uppercase letters "J", "L", "G" to be different, want to add some rule which will not apply to other letters in that first word of the sentence.
How can I set that style? I've already created the character style which I want, but I can't figure out the rule of the nested style.