In the beginning, you need to fill your profile information, upload photo and set your filters in order to find a person you are looking for.
To start a chat, you need to match with a person using Finder: you go to Finder, swipe right if you like the person, swipe left if you don't. If the person likes you as well, you will see a Match screen and will be able to text a person using the input field.
Remember that Taimi is a social network as well. You can share stories and posts, create and join groups, follow influencers and get followers. All this may be done in Digest (the middle bottom icon).