Hello 2Herds,
You can make multiple holes using sketches. At the minimal level, you can create points and then use them as centre of holes...

In this example I have made a sample cuboid and sketched some points on the top face of the object. These will be the markers for the multiple holes.

You can then use the hole tool. Use the 'From Sketch' option and select all the points. Define your desired hole parameters and you have multiple holes.

You can use other tools on the points to make the task quicker for multiple holes. For example, you can use the rectangular pattern tool to make a grid of points which you can use to make multiple holes.

Same procedure as before.
Alternatively, if you want your holes to follow a rectangular/circular pattern then you could try this second method:

Start off by making at least one hole. Then open the tool you would like to use, for example the rectangular tool, and select the inner cylindrical face of the hole (the inside curve of the hole). Then adjust the parameters to make your grid/pattern.

Whichever method you use, you should end up with multiple holes. Your holes do not need to go through the whole of the object for this to work. There may be more efficient and better ways, but I am new to Fusion 360 and this a quick way/workaround I have found.
I hope this has helped you