Well, my dd will be 9 months next week, and we started when she was 6 months, so I consider her an "older" ECing baby.
Yay for you for catching a couple of pees so far!
My biggest tip is twofold: don't force your ds and don't be hard on yourself. Your ds is becoming aware that he can pee on the potty instead of his diaper, that he can let you know that he needs to eliminate and that you will respond. That's great!.
I find that if I'm obsessed with catching dd's pees, she's less likely to go on the potty. When I'm relaxed, she's more likely to signal me that she has to go.
Lately, we've been having lots of misses, because dd is pulling herself up all over the place, and really wants to start cruising. But she has been letting me know as soon as she is wet. This a big improvement since before we started ECing, she never seemed bothered at all by a wet diaper.
Small steps, and the goal is "progress, not perfection" (to borrow a phrase from Raising Your Spirited Child
). Good luck!