noob closet growing please help

first of all i'm not a native english speaker so please understand if what im saying makes no sense
this is how my growing closet look like. so far i have 3 Top44 and 3 powerplant, and more seeds are still germinating. this is my first time growing and i'm totally clueless. please help!

1. i'm using 400w HPS and as you see i don't have a reflector... do i need one?

2. i planted the seeds in plastic cups for now. it doesn't have any holes in the bottom to drain. is it okay if i just water it regularly even though the water can't be drained?

3. when the light is on, light evaporates water and the surface of soil gets dry really fast and i have to water it every hour to keep it moistened. how do i know if my soil are moistened enough/too wet? or how often should i water it?

4. the soil i used is my country's version of miracle grow. it's got nutrients in it but when should i start using nutrients from outside source?

5. i have nutrients that look like a syringe(the one you usually just put in the soil and keep it there for months) and its got most of the important stuff mixed in it. can i use these for my plants? when should i put them inside my pot?

lastly, i'm scared that i might screw up and it won't even grow at all. my light goes 12/12 cycle and if i just water it regularly and wait will it grow?

thanks for reading and please help me! happy smoke =)

1. You don't 'need' a reflector, but it would catch and reflect a lot of the light you'd lose without one...

2. Put holes in the bottom, it's way way too easy for a first time grower to over water them...

3. You should never water if the soil is damp 2 inches below the surface. The actual top soil is never a good indicator of if the soil is still damp.

4. You shouldn't need nutes until they're almost a month old.

The lights should be 18/6 or 24/0, not 12/12 at this stage, it doesn't make them mature or flower any sooner, it just gives them less light...

having the bulb horizontal will give the plants more light as well.

thank you guys so much!

goodluck so far so good, should have good results