Project Management is an organisational discipline.
If you want projects to run better in your organisation, you’ll need to change the way in which some things are run in the organisation, not just in one person’s office. This is true regardless of whether it’s a big multinational or a small family business operating from home.
Sending one or more key staff members (or even the Top Dog!) on a syllabus-based course will not miraculously result in the changes necessary in the organisation. Changes must be made carefully, together, learning as you work, with a shared understanding of the reasons for doing things that way.