its My first time growing
Coco doesn't have any nutrients in it and perlite just helps with drainage. Yes, you'll want nutrients to feed the plant. You have the option of dry amendments and top dressing, or going bottle nutrients.
i would suggest you not to start anything before you get all the info . otherwise you are for a rough ride . go here it has everything you need
Yes, you will absolutely need nutrients. What nutrient lineup are you planning on using? Do you have CalMag on hand as well?