Jac is almost fully trained now (he has an accident every couple weeks most of the time because we didnt take him out soon enough) But what really helped was the potty pads, anytime he had an accident we would bring him to the pad and let him sniff it and he was soiling the pads within days, when we get home the first thing we do is take him out, even if he has already used one of his pads, and he normally goes. I work all day too, but i come home on my lunch breaks and let him out of the bathroom and clean up the pads if he has gone, Jac sleeps on the bed as of 2 weeks after we got him and he has never had an accident there, we take him out before bed and as soon as we wake up. What REALLY helps was to take him to the same patch of grass every time and give him a treat if he went on the grass for outdoor training, if he didnt go potty, he didnt get a treat. Theres alot of trial and error but it sounds like your getting the hang of it!
