My girl is not showing much growth. Even the leaf ...

First, if you are going to use coco, you NEED to get a pH pen and a EC/PPM meter, it is a must in this kind of growth. Second, watering: 200 cc of water per day is too much, that amount should last you 5 days or so, maybe more since you are outdoors and have less light hours than indoors. Third, coco have no nutrients, you need to supply everything, at this stage focus on cal-mag, around 150 to 200 PPM worth of it at this stage. Fourth, pH: your watering solution should be around 5.8 pH (5.5 to 6.0 pH is a good range to be in), wrong pH can be give you a multitude of phantom issues, like weird leaf stops like you are having now, so before spraying anything, be sure your pH is in the correct range.

Hello !! So you'v got multiples issues : *1st - you are over watering your plant and at that young age the roots will suffocate. *2nd - She's young so let her have 2 weeks old before thinking about a fungus and spray her for that. *3rd - Your leaf "deformation" could just be the actual shape of her but you wanna do thinks too quickly