Just to answer a few questions.
Guitars have a scale length, measured as twice the distance from the 12th fret to the saddle and therefore naturally roughly the length from the nut to saddle (there are reasons this is “roughly”).
Your guitar has a 25.3 inch scale length. I am not sure where the cutoff is, but 25” and longer may be “long” scale and shorter is “short” scale. My guitar is 24.75” scale.
The longer the scale the more tension needed for a given string to be brought to tone. The difference between your guitar and mine is probably close to 6%, so if total tension for your set of strings was 150 lbs, on my guitar it would be roughly 141 lbs. A noticeable difference, but likely less than the difference between two string gauges.
Guitars can have very different scale lengths, eventually becoming baritones if long enough. Seems like common lengths are between 24.5 and 25.5 inches.
There, more than you cared to know!
For the capo “trick” you want to tune the whole guitar down so the tension is reduced and when you put the capo on, it is back in normal tune. “Flat” tuning is 1/2 step down, tuning to Eb, Ab, Db, Gb, Bb, eb. Then the capo at the first fret puts the guitar at standard.
You can go a full step down for a greater reduction in tension. That’s D, G, C, F, A, d.
Then the capo goes in the 2nd fret.
I once figured out what the reduction in tension was for these moves, but can’t recall. I think also in the 5-6% per half step.
Someone correct me if I am getting anything wrong.
In your situation, I suggest figuring out what gauge string you like, then trying the capo trick and just seeing what works for you.
One nice thing with the capo is also to reduce the reach needed. It mimics a shorter neck, like my 12 fret guitar! Good for my shoulder!