Heidegger, Being and TIme Part 1

Re(a)d 122 pages of Being and Time, first impression that I got from this book is that it reminded me of an article that I read a few months back about a distinction between Heidegger and Lacan. I don't recall but it was something that explains the main thesis of both thinkers, and that Heidegger's main thesis is "the Being of Beings". Throughout 122 pages, if I read it correctly Heidegger is going for the completion of the Being of Beings in this work. What I find it interesting is that Being in itself is never complete; it always needs some Things in order to acknowledge its Being. Thus, to talk about ontology in and by itself is unacceptable and philosophically flawed construction. Heidegger knows it phenomenologically that it is the case, therefore, he carefully avoids defining Being and creates his jargon to make his case.
So far, his distinction between ontic and ontology is very important in understanding the main thematic of his work. I think that it is necessary to write all that because it is a philosophical treatise but it is not necessary to write it here. I didn't know the book is so clearly written, and that he very well explained his contours as to how Being is strictly insurmountable to be itself by itself; it is inevitable that it needs ontical to define its Being, thus it makes up a word Being-in-the-world. So, in a sense, Heidegger is correct that Being has already always de-centered in its essence, thus construction of tying together Being and its externalities is a superb move.