Welcome to YT!
I bathe mine once a week. I know some do every 2 weeks. Just find the right balance between stinky and overwashed and itchy.
As far as trimming, I would start taking him to the groomer as soon as he's had all of his shots. Good luck!
__________________
"If you have men who will exclude any of God’s creatures from the shelter of compassion and pity, you will have men who will deal likewise with their fellow men." — St. Francis of Assisi, 1181-1226