Random Letter Copy and paste-Little help for a beginner

Hello everyone,

I have been "playing" with excel macros for the first time in my life in the last two hours and here is the first doubt that I have not been able to solve by myself. I know it must be very easy, but please, don't be so hard on me.

I want to introduce a random letter in a cell. That is what I have tried:

Sub letra_aleat_lista_1()
    Range("C9").Select
    ActiveCell.FormulaR1C1 = "=CHAR(65+RAND()*26)"
    Selection.Copy
    Selection.PasteSpecial Paste:=xlPasteValues, Operation:=xlNone, SkipBlanks _
        :=False, Transpose:=False
End Sub

As you see, I use the random character function and I do a "copy-special paste" in order to get rid of the function itself and keeping just the value, so it won't ever change. What I don't like about this is that the cell keeps selected with that twinkling edge that appears after doing ctrl+c, and I don't want that. If I were not using a macro I would press ESC, but I don't know how to make the macro do this.

Well, that is my problem and my rudimentary attempted solution.

I would also want to ask for a good source of information to avoid posting this kind of threads in the future.

Thanks in advance.