You can only chat with other Tinder users that have been matched with you. In order to make matches, you will need to Like some profiles. When you start Tinder, you will be displayed the first in a list of possible matches for you in your area.
Neuroticism is a fundamental personality trait in the study of psychology characterized by anxiety, moodiness, worry, envy and jealousy. Individuals who score high on neuroticism are more likely than the average to experience such feelings as anxiety, anger, envy, guilt, and depressed mood.
One of these traits is neurosis, and, yes, neurosis by that narrow definition is a personality trait. As we all know, personality is pretty much static over time. It changes a bit here and there, mellows with age, but a person with a neurotic personality in youth will likely have a neurotic personality in old age.