Hello new grower need some help before starting with plants

I'm starting with a old closet that i fixed to be much stronger
inside there isn't much ventilation so for that i will buy 2 clipon vents one will be on the lamp and one on the plant(s)
i'm using 400 hps by SUNMASTER and cool tube
i also will apply inside a mylar reflection or something.
now in my room there is no AC only big fan i think now its between 25 to 28

biggest thing at this point is a high CFM inline duct fan to suck out as much air as possible at the top

at least 150 CFMS sucking directly out of the top of the closet, and a free flowing intake at the bottom

otherwise that HPS is going to cook your plants, beyond any doubt

Agreed, you will need lots of ventilation, intake and exhaust if possible. Clip-on fans won't move enough air.

do i need something like that?
or like that?

First one. Inline fan.