"Me" is used in a very non-standard way here. It would often be stylized to show that it is unusual:
the "Me" I want to be
the Me I want to be
the me I want to be
Your rearrangement I want to be the me is not correct. It doesn't make sense, and additionally it changed the original which was not a sentence into a complete sentence.
To aid you in ...
For my understanding the sentence as you quote it says indeed: "He went out, and there he saw (and got aware of) that there is nobody else." The situation includes a certain element of surprise.
However, you cannot say with total certainty what the author wanted to tell unless you have the broader context, i.e. more details on the situation described.
The sentence means
Project planning provides a detailed plan that does two things. It details how and when the project will deliver its results. It also serves as a tool for communicating, managing expectations and measuring performance.
Trying to cram all that into one sentence is apt to lead to a sentence that is hard to understand. Here the failure to ...
If the question about 'complex sentence' expects a syntactical reply, "A complex sentence has a main clause and one or more dependent clause(s).
E.g. Project scheduling provides a detailed plan that represents how and when the project will deliver the products, services, and results. Here "Project scheduling provides a detailed plan" is the main clause.