Is it easy to repair small drywall holes?

It depends. Generally it is a relatively simple process, the difficulty can come when you have a texture that is difficult to match. We can make it look brand new by matching the texture with professional texture gun and painting it to match. 

How can I identify if my texture is difficult?

The best way for you to identify a texture is have me come look at it.  The difficult textures are typically hand done and much more intricate and noticeable. I will post pictures here as soon as I can. The most popular texture is the Orange Peel. This looks very similar to a rough orange peel. Then there is Knockdown, this looks kind of like a map with both flat smooth spaces and rough. Finally, the third popular one is Popcorn; this looks like a very rough almost prickly texture that is typically used on ceilings. 

Will it create too much dust?

Drywall is notorious for the dust caused by sanding it down to get it perfectly smooth. We do not generally power sand our drywall, and typically use a sponging technique to smooth the drywall. This often eliminates most or even all of the sanding and dust.