Need help new grower

My plant has first 2 cannabis leaves and got some bits coming out the middle of them it's 7/8 days old now it's about 4/4 and a half inches long I'm using a hydropolic system should I feed it now if yes how much nuets and to mix with how much water my hydropolic system has 18 litres of water in it

Not going to get much in the way of an answer without a picture.

Have no idea what "some bits" look like.

yes 50ppm to 100ppm as far as how much water? are you in a doing dwc or ebb n flow or drip feeding it. its not how much water useing dwc the roots need to be in solution the other need there roots moist about 4 times a day its amount of nutes to water were you get the ppms you want. the amount of water solution depends on system and helps control the water temps ,water temps should be in low 60s hope ths helps not sure on what system you have, start with r/o water or distilled water that has no or very little ppms to start with before adding nutes

It's a dwc system and it's just feeds and gives it air and water itself and waters about that... that lights on 24/0 it's got 18 litres init I want to start feeding canna veg but wanna no when and how much

Do you have a tds pen to measure your ppms?

What's a Tds pen and what ppms lol

Do more research man, TDS pens and measuring ppm are essential to run a proper hydro system.

Those "bits" is the main growth shoot. IT will grow, put out 2 opposing branches with a fan leaf on each (most likely 3 bladed). Then it will grow more and put out 2 more opposing branches with fan leaves (likely 5 bladed). Then more growing and more branches and fan leaves (5 then 7..most stop at 7 or 9 but 11 isnt unheard of) The whole time the "bits" will be growing up and producing new branches at the nodes (where the branches meet the stem).

As it gets bigger, new shoots will grow from the nodes at the crux of the branch and stem. Branches start branching and the main tip keeps growing up and producing more branches.

And its "hydroponic" not "hydropolic"

Why did you choose hydro with such little experience with growing? IMO, soil is easier for first timers. You can get an idea of how a plant grows and what to expect, how to spot and remedy common problems and how to flower for decent results.

I would do some reading on cannabis cultivation. Look at lots of pictures, learn about nutrients, pH, vegetative and flowering states, lighting etc. It will be a lot easier for you if you go into it with some idea of what to expect.

Good luck! I cant wait to see the harvest. Be sure to post pics.