If you don't have your own Timesketch server yet the first step is to install one. Follow these instructions to get started:
Uploading your first timeline
When you have a Timesketch server setup it is time to upload some data. Timesketch supports Plaso storage files as well as CSV and JSON formatted files.
Search and explore
When you have timelines uploaded to you server it is time to learn how to search and explore your data. Take a look there to get started: