How do you define immediate? Instant change when you take the headphones off or just noticing the subtle changes in your action during the day.
Since you're referring to the belief tape I'd like to offer a suggestion. - Avoid looking for instant results. To do that you have to hold onto your old belief to test it against and as long as you hold your old belief conscious you don't change it. After listening let it go. At the end of the day do a self check as to how often you applied the new belief and how that has made small changes. The irony is that even though we have limiting beliefs they do not necessarily come into play every day and if they do they will not be changed overnight.
Give it time.
A plan of action will depend on your personal goals. The closes thing to a universal plan of action is the Natural Brilliance model.
Alex