the letter ( ل ) Is the answer to ( لو ) which is a condition tool. used in this sentence to indicate that the response is not achieved due to the impossibility of achieving the condition.
1) if I start my story. . . . . .
2) it may be closer to reality, but I have not started it as that....
A) لو: أو شرط امتناعية
B)ل: لام الجواب