I'm in agreement with Iris-Grimoire here, the pacing is too fast. Episode 0 is a bit hard to follow.
It throws very very brief bits about the character's abilities, backstory, the setting, not really fleshing out any of them or giving the reader breathing space for it to sink in, and immediately throws a new character at us. It doesn't really mean much to have the character be like wow, this person's energy is like nothing I've ever seen before! When I, as the reader, am like... I don't know what your energy is like, the comic hasn't established what a normal elemental person is like and now I'm meeting a special one? And then he's summoning a weapon, and then he busts out angel wings like woah, slow down, this is too many different unexplained magical concepts in a row for me to grasp what the rules are here. Is is power control of controlling or making things out of earth and, apparently plants? Or does he just summon a weapon that he can manipulate to a limited degree? Do all elementals have angelic wings? These were questions I was pondering while reading.
I feel like you were maybe really excited to get to the cool powers and fights, which is understandable, but it probably would have been better to start the story either shortly before he gets his powers, or just when he gets them, so that we can discover his abilities one by one as he does, dealing with smaller threats, like people with similar powers of a different element, or seeing how he fares against... I dunno, people with guns, or against monsters. Then, once the rules are established, you introduce Purple McAbsMan who DUN DUN DUNNN is breaking the established rules of the setting's magic system, yikes! He'll feel much more intimidating and scary that way.
The introduction of the second character, the girl, is a lot stronger, and more how I'd expect a character to be introduced. Establishing a mystery: the strange feathers, establishing her personality and the ways in which her life feels lacking, how she feels alienated and unimportant, and she's bullied at school. I feel like after chapter 0, the pacing gets much better.
The art is good, but a little consistency would add polish. It feels like you're still sort of trying to find your style. The way characters and environments are drawn shifts a lot; sometimes more manga and sometimes more naturalistic, sometimes with line art, sometimes without, and the shading shifts between cel shade and soft shade, even sometimes painterly with canvas textures (Or in a really jarring panel, low-detail 3D models with textures tiled at too small a scale and inconsistently in the x and y axes?. It might have been better to use the 3D as a reference to trace the building shapes with lines then throw on some basic colour and shade? My friend Anna did a tutorial on it.). It tends to feel less like a stylistic choice and more like you're switching style away from manga when you don't feel confident about rendering something more complex or using reference in simplified, clean and stylised manga style lineart. It's absolutely reasonable to shift style to tell the story, but there needs to be just a bit more consistency to the overall look so that when you break your own rules.
Overall, I think I'd try to reuse as much of the work you've done already rather than scrapping everything, but to see if you can pace it out a bit to establish the main character and his abilities more gradually. I wouldn't scrap any of the art you've already done, but going forward I'd recommend trying to just put in a little more care to being consistent, which will get easier with practice, especially if you bite the bullet and try your best to draw the things you struggle with rather than trying to use painterly effects as shortcuts.