Water entire pot. never leave dry y pockets or zones. Wait for top 1" to dry, then repeat. Simple. Don't deviate until you gain more familiarity, and even then don't deviate, lol. If coco, wait for top layer to dry, then repeat -- coco holds less water per volume, so there is more dryback than meets the eye. The weight of the pot is the best way to know irrigation needs. This will be fairly similar no matter what substrate you use.
Don't choose the volume of water. You use as much as needed to ensure the entire thing gets wet. A little runoff is fine, but if in soil you typically want to minimize that. If you water at same loss of weight, it will require the same volume of water -- so it can be predictable but only in retrospect do you learn what the volume is.
Not much info was given, so consider wwaht you've done so far... IT looks a bit pale, so it may need more fertilizer than what you have provided. If you've been feeding heavily, you need to dial back as it might be lockign things out. If it is potting soil, you shouldn't need to fertilize yet, but fi the plant pales, it clearly didn't have much of a pre-charge in the substrate to start.
One other thing you need to look at that the picture cannot show -- is there any space between the growth nodes. At 14days some internode length should develop. If all those leaves are sprouting from virtually the same spot on the stem, give it less light. The distance between nodes is your guide. Stretchy = more. No stretch = less. you want that "goldielocks zone" somewhere between.