And about grammar I'll try to fix it as soon as I can unfortunately english isn't my first language
Best way for learning is *simple* (but not easy): practice, practice, practice.
With feedback, of course, if the only thing you do is write and never accept any corrections, you are not going to improve. But given your answer to the remark and the simple fact you are posting on a forum and not FFN, I don't think that is going to be a problem.
I may as well give some of this feedback while I'm at it, on my phone so not going to do the entire update (tried once, never again), but at least the beginning:
The entity was experiencing something that the bipedal lifeforms that dwelt on this planet would describe as 〔Confusion〕 Of course, such a limited word as "confusion" could never truly be adequate to describe what the entity was feeling.
Need a . or a , after [confusion], if you put an , you would have to remove the majuscule for *Of course*
Otherwise: would flows better than could for *could never truly be adequate*, that, or you keep the could but put the be before truly instead of after (could never be truly adequate).
The entity had spread itself alongside its partner. into countless smaller pieces of shards, They were broken and restricted so that they might not pose a threat to them. each of shards was refitted to make them compatible with the indigenous people of the world, so that cycle could be ideal. and yet recalling the memory from the banks brought alongside it Another human concept with which the entity had become very familiar was anguish.
Several punctuation problems here:
*alongside his partner into countless smaller shard pieces.* works better, as it is a single idea and don't need any punctuation. It also is a complete sentence in and on itself.
Since the preceding is a complete sentence: *Each shards* or *Each of the shards*
*indigenous people of the world* is redundant, indigenous already means they are from the world, no need to say it twice.
*so that the (or this) cycle could be ideal.*
If you put a . remember to put a majuscule after it, and do check if you have a complete sentence when you want to, or if the rest could be put in the same sentence, leading to a , instead. (But careful about not making too long sentences with a lot of , in them.) It also is not a good idea to end a sentence and immediacy begin with *and*, so you should probably remove the . anyway.
The end of what I quoted is very awkward, *and yet recalling the memory from the banks brought alongside it Another human concept with which the entity had become very familiar was anguish.* doesn't read well, I think you meant something along the line of:
*and yet recalling the memory from the banks brought another human concept the entity had become very familiar with: anguish.*
Hope that helps.