This is an excellent essay, Renata. I'm surprised it hasn't gotten more attention; it certainly deserves it.
Your advice is wise. If followed, it would help many people avoid a lot of unnecessary misery, and it would save many relationships from being scuttled prematurely just because they don't live up to someone's fantasy.
Build first your relationship with yourself, and never compromise on that. Then you will be ready to connect with someone else, and to evaluate what the two of you can add to one another's lives.