The difference between the 19 and the one however, is that you enter your new phase of life armed with knowledge, rather than entering into the unknown as The Fool whereby you wander into the unknown with no preparation.
The 19, like the ten, suggests you have a better understanding of your emotional state which you can use to achieve a new level of insight. Oftentimes the repetition of the number 19 in your life is accompanied with happiness and you feel energised.
From a negative point of view, the 19 represents you are going round in circles and making the same mistakes that make you unhappy and depressed. If you repeatedly see the 19 but do not feel any satisfaction with your circumstances, think about what you are doing wrong and fight to change your habitual mind.