I started out with a male, the girl prices were soooo hiiiigh. Like you, I was very afraid of the hiking, the potty training. I read everything I could find so that he would be potty trained. It takes a lot of consistency, watchful eye, if you catch him in the act of going inside, say NOoo! immediately take him to the pad or outside, you can also train him so that he can go on command, I can tell Zander go pipi, and he will go. When you are training its important to give the treat as soon as he has gone #1 or 2.
My girls were much quicker to train, they are both looove bugs, looove to be held and given attention just as much as Zander

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To cut down on the humping I did not let him play with big stuffed animals, he would fluff his bed and get carried away and start to hump it, so I would say No, distract him with a toy. Training, the most important part of his future character/personality.
Have fun with your little one