Heldrad

Introduction
You now have your manga ready for some text. As part of the panelling and story boarding process you have created the speech bubbles and have a rough idea of where your text is going to be placed.
At this point you may have hand drawn some SFX or will place these on with a font as well.
The main point is to keep it consistent across your manga, changing your font half way through is often seen as sloppy and unprofessional.
Basics
Types of Text
There are many types of text in any given comic or manga, such as Normal conversational text (this is your primary text), Thoughts, Scene Queues, Background Descriptions (no text bubble or rectangular blocks typically), Soft Voice/Aside, Yelling are just some of the examples.
For each of these situations have a consistent font/style choice across your manga. Some variation may be advantageous, such as modifying the lettering if th