The easiest way for you to learn to train your pup is to buy a ton of treats and watch a bunch of Youtube videos.
I have taught myself how to teach Sit, Stay, Down, Roll Over, Sit Pretty, Speak, etc. all through Youtube. And so far, the site has not let me down.
You don't need to pay for special books and training sessions at a fancy gym. As long as you have Internet, you are good to go.
So, with two puppies, the one thing I have definitely learned over time is that you need to separate them when trying to train them.
We put RJ in his crate and work on Champ, then rotate. That way there is no pushing and shoving, and no distractions, between the two brothers. Plus, if he's smart, the puppy in the crate will watch his brother and figure out what he needs to do to get that treat when it's his turn (but who are we kidding).
Also, I'm pretty sure my dog has ADD, but maybe all dogs seem that way, so if he's getting distracted and you lose your cool, just stop. If you keep going, the dog won't listen, you'll be angry, and it just won't be a fun time for either of you.
I guess those will be Tips#1-3, so
Tip #4: this Sit and Stay thing is a process, not a one-day tutorial. We've been at it for weeks and still, each day, we review it because they have yet to listen every time.
Tip #5: aside from actual training sessions (which I think you should do twice a day for like 10 minutes, just to practice the skill repeatedly for a little while), Sit/Stay gets awesome practice if you do it before each meal.
We've been doin' it since Day 1...or more like Day 4:
Hold the bowl high, say "Sit" and "Stay" and don't let them get the food until they have actually done it. Don't give up and just give them the dang food if they get up too early. They should wait until the food dish is actually on the ground before you say "Release" or "Come" or whatever.
(I was consistent and meticulous about this but some other members of my family, not so much. So again, make sure the pups are doing it correctly before you give them the food. Dogs like food, they'll learn pretty quickly.)
Remember, it's a process. (We are still working on the distance we can get them to Stay). At first, make sure you don't go very far before letting them Come to you or they'll never learn what "Stay" means.
And don't forget: Youtube. It's great.