Interest and commitment look similar from outside and behave nothing alike. Interested people act when it is convenient. Committed people have already put something at stake — a deposit, a date, another person expecting them.
That is why booking the appointment works better than resolving to go. The resolution lives entirely inside you, where you hold full editing rights.
Fast track is optimistic. Committed is available right now.
Find the smallest way to make today's intention external before lunch. Tell someone the date. Pay the fee. Put it somewhere you can't quietly revise it.