Seems like you've got all the good advice you need here, Cannichef_Rodri. I'ma repeat advice that I gave in a similar thread on this forum...
You'll develop an eye for defoliating & pruning-- knowing what to look for, plus you'll figure out "your" personal system to doing it. The basic idea is for air-flow, minimizing areas bugs like to hide in. The low & inner areas often produce branches & buds that are thin, small & "larfy", and the theory is that the plant will use life-force energy to keep these small, goofy nuggets alive when they're never even really going to grow much at all... So then by trimming those branches (& buds) away, we're (in theory) diverting that life-force energy towards the larger, more significant branches & buds.
The plant is resilient and, in it's veg-phase, will keep producing new stems, stalks, nodes & leaf-clusters, so we can (and kinda should) be as heavy with cutting & pruning as is sensible. The plant will recover & regrow practically un-phased... But then, on the other hand, the leaves ARE the sugar. The leaves ARE the things that absorb the Sunlight. So I also believe that too many people are too heavy-handed at de-foliating perfectly good leaves that the plant could use for energy in making bigger, sweeter buds, and that we should maybe keep those on the plant until she's finished with them, & the deep & vibrant green has faded from them.
Jorges Cerventes is an ol' school grower whom I admire. Just watch this short video-clip & listen to the thought-bombs he drops on defoliating:
I have a personal twitch regarding bugs and mold, and they both love those tightly packed, dense areas of foliar growth. Create "rules", so to speak, as you learn & figure things out, and it helps to understand your goal. For me, it's always bug-prevention & mold-prevention. So it's keeping as much potential bud-to-be as I can, while also clearing-out as much as I can to make space. Keep in mind that the growth remaining on the plant will stretch, sprout, & blossom even more than it would've
if you had not cut away anything. Just remember that once the plant is well underway in flower, you'll really want to minimize stressing, cutting, & traumatizing the plant.