TL DR: You probably need to add (package-initialize)initialization to your file.
You do not need to create startups for your packages. The package manager does this automatically after installation. You will find the appropriate files -autoloads.elin the package directories of your directory ~/.emacs.d/elpa/.
. , Emacs Lisp, (, ), , , .
Emacs , "" . Emacs , init.el.
, ( ) , init.el, init.el.
, after-init-hook Emacs , (package-initialize) .