First Grow Nutrient and Water Questions

Hi,
I'm new here. Just got some cuttings from a friend, doing an indoor grow.
For the soil, I mixed together cocotek and worm castings and some myko around the roots.
I have liquid nitrogen (can't remember the name right now), cal mag, biocanna vega, biocanna flores, and guanos. I'm so confused about what and when I'm supposed to use all this stuff and if I'm supposed to use it all together. Can someone help me with this? And do I have everything absolutely necessary?

(I also have neem oil to spray to scare away mites.)

As a side, I have well water at my house. I was told if I used rainwater, I wouldn't need all the above nutrients at all. Is the same true of well water?

TIA.

You will want to test your water with a ph test. Generally what I do is pour the water the night before and let it sit out. Have never had a problem doing that.

As far as mutes go you should download a deffecincy chart. Typically at the beginning you won't need anything until about the third or fourth node. It's always best to listen to your plants tho. Pay attention to how the leaves look.

Do you mean if I let the water sit overnight that it should be fine? Can you let it sit over a day or will yucky stuff start to grow in it?

I'm sorry, I don't understand - how the leaves look? How will I know what of the things I have to give it?

Where do I find a deficiency chart?