Reddit reviews Puppy Start Right: Foundation Training for the Companion Dog (Karen Pryor Clicker Book)

Stop picking him up unnecessarily, stop taking him to places where he cant be on the floor because he hasn't had his shots, stop introducing him to random people. Bring him home, let him chill in his house.

Stop yelling at him and spraying him and messing with him when he eats.

I honestly don't know where to begin because so much of what you are doing appears to be stressing your dog out that it's impossible to tell what to be concerned about and what is simply him reacting to you and all of the stress in his environment. The good news is that there is so much going on that is not very good for the puppy that I expect that if you change those things it will go a long way towards improving his behavior.

I would find a trainer who has some educational background in training. There is no real certification process so anyone can call themselves a trainer, and that's the type of trainer it seems you have been going to.

Positive reinforcement is realistic, and is not going to create the kind of aggressive responses you are getting currently. I would also recommend picking up the book Puppy Start Right. It's an easy read with lots of good training exercies in it. If you find a trainer that isn't using the same basic techniques, find another trainer.

Honestly, doesn't sound like you'll have time for this dog. I read your other post. There was zero planning here. But you can still fix this if you decide to keep the dog:

The book Puppy Start Right will help answer a lot of your questions and more. You won't have to search through other sub reddits or wikis.

Check for puppy socials\playgroups in your area. You want to make sure it is socialized properly

Make sure he has toys to chew on. Find something he loves. Redirect him onto that when he goes for something he shouldn't.

Bring treats outside with you. Wait out there until he pees\poops whatever. When he does make it a big celebration and give him a handful of treats. Repeat the process.

If you haven't taken him to the vet yet please do that too

Seriously if you can't do any of these things you should seriously consider finding that dog a new home

Set up as many positive experiences with strangers and other dogs as you possibly can. Puppy socialization classes are your best friend. Everything else can come later.

Puppy Start Right is my favorite puppy book.

I've been looking through Puppy Start Right sand I dig it so far. https://www.amazon.com/dp/1890948446/ref=cm_sw_r_cp_apa_pxvgzbH2X29EE

It has information on all sorts of puppiness, but mostly behavior related.

I also got a whippet puppy in Jan with -30C weather. It was a challenge at the beginning because she was used to using newspaper at the breeder's indoors. We got a piece of sod initially but she was more consistent when we took her into our backyard. A warm jacket is a must. They'll learn quickly to just do their business quickly to get back inside. You could also use a shower stall/tub if in the middle of the night and freezing.

I'd suggest finding a puppy socialization class initially. Puppy Start Right was recommended (https://www.amazon.ca/Puppy-Start-Right-Foundation-Companion/dp/1890948446/ref=sr_1_1?ie=UTF8&qid=1517626807&sr=8-1&keywords=start+right+puppy) and I'd suggest you watch some youtube videos (I'd suggest Zak George).

Crate train is a good idea for your own sanity (and property), and you'll learn to discern the usual whining from "i need to go potty" whining. There are videos on crate training as well.

Good luck and enjoy the "good" moments! He will definitely try your patience!

Start working on clicker training. A good book to use is Puppy Start Right: Foundation Training for the Companion Dog (Karen Pryor Clicker Book) https://www.amazon.com/dp/1890948446/ref=cm_sw_r_other_apa_i_gc0UDb5Y1RQB5

Also here are some links to videos that can help:
https://journeydogtraining.com/13-dog-training-games/

KikoPup has a lot of videos, here's a starter: https://youtu.be/YF7boyICV7M