closet grow northern lights autos 2x3x6

Dododoo THIS IS MY FIRST GROW. Hi all, thanks for helping me out. Today I am germinating 3 northern lights autoflower seeds, expecting to fully grow two of them. What do you all think of my setup? can I grow 1,2, or 3 plants in there? In inches its 42x23x84. I have lined my grow space with reflective panda film and am growing in 2.5 gallon air pots with happy frog soil. I am considering using fox farms trio of nutrients, any advice on that? I have a small fan, humidifier, and dehumidifier. Is my light sufficient for more than 1 plant? I know it lacks in the red light department so I was considering another cheaper bloom enhancing red light to add in for the flowering stage. Thankyou for investigating my grow, please help me out if you can, any and all info would be much appreciated as this is my first grow and im not even sure its going to work out.