I do respect you for doing all this research before you get your puppy it would be great if every dog owner did this.
I do think you will find having a puppy quite hard work with your commitments.
They puppy will need lots of small bursts of exercise to start with. They will also need feeding 4 times a day.
eg out at 6.00 for wee and poo small play session
Breakfast
hour later out for wee and small training session and play
back to sleep for a while lunch
small amount of exercise for 10 mins
sleep
tea and play session
supper and play/training session
This regime will need to go on for longer than 6 weeks. Also inbetween times need to take pup out every hour or so for the first few months.
Labs certainly like a lot of exercise but be careful as jogging is not great for them. They like a large amount of exercise but constant jogging is not recommended (unless you get a dalmation they will run for hours but will not really fit into the rest of of your lifestyle!)
If you could take up Valhala's option of a resuce dog you would miss out on the intensive puppy days and would also have a dog that you can see what you would get! eg if they would love to jog and are happy to chill when you are at work for a few hours. Dogs do love to sniff and mooch on their walks as well so this will need to mapped into your plans.
Good luck with you search
PS dogs can compete at agility at 18 months.