I haven't gone to a professional trainer for any of my dogs. We've always just "winged it". My husband has this natural thing about him that dogs respond to. He is having a bit of trouble with Angus because Angus gets really scared of him. He is some super omega dog that the first week we had him, when the doorbell rang, all the dogs run barking to the door while Angus runs with tail tucked to the far corner... And the first time he ate on his stainless steel bowl, his dog tags hit the bowl and made a clanging noise which caused him to turn tail and run to the corner and he didn't eat for a few days! So, Angus would cower and hide when my husband gives him a command... it worked okay though because then he listens to me very good. He responds to my hand signals perfectly! Bullie is more stubborn.
But, yeah, Congratulations on finding the perfect trainer! They can be really hard to find that it's such a blessing to have one that works very well with your babies.