1) Start off with Coach's post. Train consistently and follow the steps, starting with step #1. Don't skip steps.
2) After your workouts, EAT. As long as you aren't consistently eating nothing but sugar (literally zero protein or other nutrients), in other words as long as you are eating FOOD there will be enough in it for you to grow. Eating crap may keep you at 13% instead of 8%, but you'll still grow strong. If you really get on point with your nutrition you will see much more dramatic changes, but the #1 thing is this: You NEED energy surplus in the moment to power accelerated metabolism!. Just eat food, and worry about details when you have the time and money.
3) Stop thinking about other people. You can't make them weaker, or dumber, or less dedicated. You can't affect their genetics, and you can't change their training history.
4) Start thinking about yourself! You CAN change YOUR training history starting with today's workout. As you work out, genes that are inactive BECOME active and your body will express a different phenotype when you work out regularly, all the way down to cellular energy metabolism.
Bottom line: Forget about everyone else and focus on yourself by training regularly and following the set progressions, starting with the first. If you've almost mastered the 5th and haven't even touched 1-4, start spending more time on 1 and less time on 5. Maintain your strength, but spend most of your time training the things you skipped. Continue focusing on yourself by making sure you are eating enough food, and if possible try to keep the food quality high (but quantity comes first when talking about strength gains).
Follow the bottom line and you will be on the path to success. And planche.