hello minkin, I've just tried to start speed sessions, with a 2-2 like you, I've been doing it on the treadmill at the gym, hate it really, but it does keep me going at the same pace.
My outside is hilly,and I've always understood that hills are as good as speedwork, except that you don't get the striding out feel, but I do that downhill,
I think the trick is to try to keep to the same pace up the hill, thereby increasing heart rate, and I suppose when you get better it's possible to increase up the hills?