First of all DON'T panic. If you are confident you want a dog in your life, thought through all the aspects and prepared to work to make yours and your pup's life enjoyable there is no reason why it will be so hard that you can not manage.
Our housetraining experience was very easy - I had a crate and the puppy loved it (she is too big for it now, but just before we moved it into the garage she was still getting in for the day/night nap, we never closed the doors past her being 6 months). We had 5 (five) accidents in total inside the house and another 2 (two) incidences of upset tummy. It is not like that with all , but not so unusual either.
Lab pups bite and a lot! Be prepared for it and also to deal with it in the positive manner. No physical punishment please, you puppy must must must associate your hands with friendship, care and pleasure.
Get lots of chew toys (kongs are the best). You can stuff it with all sorts (bananas, cottage cheese, etc). My puppy picked up early on that the toys for chew, furniture is not, so the only time she actually damaged something was when I left her for a long time without a toy and she nibbled a door post. Nothing else. Use VetBed for bedding, they don't chew it, even if they do, it is easy to repair/replace. Buy it fron Ebay NOT petshops, absolutely the same stuff much less expensive.
Bowl, food (keep to breeder's diet til s/he settles, soft puppy collar (nothing fancy pls, they grow too fast), tag (there are legal requirements what you need to have, so be careful what you actually put).
Book plenty of puppy classes, it will be fun for you and the pup and you will learn a lot. Look for professional classes. I have been to a few and some are dire. I settled on The Company of Animals, which is fantastic. Buy The Perfect Puppy by Gwen Bailey. Watch DogTrust Puppy series. www.youtube.com/dogstrusttraining#p/c/6/oVZ4_LvMwJ4
I am sure others with more experience will have other suggestions. If I think of something else, I will add later.
Enjoy!!!