Is this going to make it easier to achieve those six goals?
Think about it.
You want to improve your squat and DL. Good idea. It isn't uncommon for the two lofts to feed off each other, but it also isn't uncommon to find no carryover between them. You may be lucky, or you may not. But, many, many lifters have improved their squat and deadlift simultaneously so there is no reason you can't.
You also want to improve your bench press, press and log press. Now, I have heard many people say that their bench press improves along with their press. I have also heard the opposite. My personal experience is that there is minimal carryover between the bench press and press. Getting better at one doesn't not necessarily mean getting better at the other. Then you have the log press, which appears to me a different lift entirely, as I understand it to include a clean element as well, not to mention the log press looks significantly different to the barbell press. If you're lucky, you will get some carryover between two of these lifts. But, you are still going to be focusing on growing three press variations that may very well not feed off each at all and may in fact detract from each other.
Then you add farmers walks. These tax much the same muscles as the deadlift and squat, not to mention the press and log press because of how you have to fight to remain stable when pressing.
So, you are going to be hitting six lifts hard and heavy; six lifts that between them use similar or the same muscles. Are you going to be able to devote enough time to each lift to realistically get better at it? Let alone recover sufficiently to increase strength? Doubtful.
You're 15. This means you have school five days a week, not to mention out of class activities. Even training six days a week - which I doubt is a good idea - you would only be able to devote one day per week to each lift. Given it is unlikely you are particularly experienced at any of the lifts, you will simply not get enough volume per lift to get better at them. Not to mention training the lifts six times a week will be taxing on your recovery capacity especially if you are aiming to get stronger on each one.
Now, I'm not saying not to train all those lifts. Absolutely if you are aiming to compete in strongman they are all essential lifts to train.
However, I strongly suspect that if you focus on, for example the squat, press, deadlift and farmers walk and simply include some practice on bench, log lift and duck walk without pushing the load on those you will most likely get far better results.
The other option would be to still train all the lifts but focus on only two or three at a time for blocks of time.
Focus: squat, press,
Accessory and practice: DL, farmers walk, bench, log press, duck walk
Focus: DL, log press
Accessory and practice: squat, press, bench, farmers walk, duck walk
Focus: bench, farmers walk
Accessory and practice: squat, press, log press, DL, duck walk
Focus: duck walk, press
Accessory and practice: squat, bench, of press, DL, farmers walk