In general, an editor needs to use at least two fonts when typesetting: one for the main text (an all-caps font), and another for small-text (handwritten text). Some groups use another font entirely for thoughts/the narrator, and, of course, you use a variety of fonts for SFXs. Below are just examples of fonts to use; groups tend to have their own standards. For SFX, you can literally use any font; feel free to check out sites like FontFreak to pick out your own. Any of these, however, will be fine for practicing typesetting with. Grab these three font packs:
The "Etc. Pack" has four fonts that are fairly easy to read, and tend to make good credit page/title page fonts. FlairSSK is often used for notes within a manga (for example, and arrow pointing to a boy saying "clumsy"). Also, MarkerFinePoint & Flair (since they're clearer) would be good choices to typeset signs/menus/etc in the manga. SFX fonts tend to look better as you enlarge them, which is why they aren't a good idea to use for small-text.
The standard main font: Wildwords black, font size generally between 12-14px.
For small-text: Most of our editors use Augie, but you may choose any font that's easy to read.
For SFXs: Completely up to you ^^