Start off with small jumps that are only about 10 inches from the ground. Put him on a lead, run up to it and jump over it with him. When he gets the hang of it, gradually increase the height of the jump. He want really notice!
Be patient and positive and you’ll get there.
You could also attend agility classes, I’ve just started taking my springer to them and she loves it, it really tires her out, which as you will now, It’s hard to tire a springer out!
Good luck