Space between first and second word in the beggining is not same for every line in one text box

Hi @brankica:

When a paragraph is set to justified, InDesign adjust the spaces to force the text to the right margin so their width is unpredictable.

A tab (^t) is the default setting, but you might also try an em space (^m) or an en space (^>) to see which one you prefer. Like the others who have already commented, I do recommend not relying on a space. All of this—including creating an endnote paragraph style—is handled in Type > Endnote Options.

~Barb

Do you use a tab between number and text?

The dot is possibly the invisible character for a space - which would be different depending on the width of the character preceding it. 

You'd want to make it a TAB between the endnotes

https://helpx.adobe.com/ie/indesign/using/endnotes.html#:~:text=Changes%20you%20make%20affect%20existing%20endnotes%20and%20all%20new%20ones.%20The%20following%20options%20appear%20in%20the%20Endnote%20Options%20dialog%20box%3A

And set the TAB in the Paragraph Style for your end notes
https://helpx.adobe.com/ie/indesign/using/tabs-indents.html