The timeline of TWD comic is quite complex and spans over several years. It starts with the outbreak and follows the characters' survival and struggles.
To read the TWD comic, first make sure you have a legal way to obtain it. You could buy physical copies from comic shops or subscribe to digital comic platforms. Once you have it, take your time to soak in the details and follow the plot.
The easiest way could be to subscribe to comic book subscription services. They'll deliver the TWD comics to your doorstep regularly. Another option is to check out conventions or comic fairs where you might find special editions or rare copies.