You can find TEDx events close to you through the TEDx homepage, or the events page. Simply enter in the city name, event name, or country you wish to attend an event in.
Once you find the event you wish to event, you can go to the individual event page to find information about the venue, ticketing, and the speaker line-up. If the event is still a ways off in the future, please know that all of these details might not be posted yet.