Hey! I looked up your comic because there wasn't a link, you should add it on
Anyway, I read the first chapter and here's what I think:
Art: The way you drew characters and backgrounds is very strong! Better than the average comic around here I would say. The best way to improve on this to even better standards is to not use too saturated colors. That way the eyes don't get too "strained" reading.
Writing: There are many spelling and grammatical errors. If possible, (but not the easiest) get someone to proofread for you. If not, a writing program might help. Are you native Spanish speakers? The name "German" should be spelled "Germán" so people don't confuse it with the country. But I'm nitpicking at this point so forgive me. And this is my personal preference, but thicken up the lines for speech bubbles and give them more shape so they don't look too much like MS paint circles. (Hopefully that makes sense)
And that's what I got for ya. I see potential!