You are very lucky to get a horse like this, they are very inteligent animals, learn fast and forget little.
I was lucky to ride several of these, they where trained to do tricks, eg:-laydown, rear, rear and kick, dresage, etc.
Do you know of his background, has he been trained in any of these areas.
If so, you may be able to learn some of the aids. Can be tricky.
Is he a stallion, or gelding, if uncut, has papers and has a very good temp. You could consider breeding with him.