First Time Growing ! ANY HELP WILL BE APPRECIATED !

hello, im new to this site.. glad i found it.. and i hope someone replies
okay.. so im herb420life .. i i make youtube videos reviewing strains and whatnot , some of my viewers thought it would be cool for me to start growing..
( which i always wanted to anyways )
so with that in mind i basically built myself a pretty nice grow box ..
( i will attach pictures ) ( sorry the plant has lines through it .. my camera cant handle that color light i guess ? ) * PLZ NOTE .. I AM A STONER ON A BUDGET ! SO I WAS TRYING TO SPEND THE LEAST MINIMUM TO GROW MY 1 PLANT

so what i did was basically got a big 55 gallon bucket.. lots of room.. put reflective all around .. and i have one fan on top .. blowing in .. and one on bottom blowing out.. it has great air flow actually..
so i only want to grow one plant! only for myself ..
so now that my box was built i went to a hydroponic store .. THIS IS WHERE MY QUESTION IS .. :: THIS IS HIS SUGGESTION SINCE HES " BEEN GROWING BOMB FOR YEARS " .. SO I TOOK HIS ADVICE .. DOES THIS SOUND CORRECT ? I FEEL LIKE IM MISSING KEY THINGS? BUT IM NEW .. SO MAYBE I DONT KNOW .. AND THIS WILL WORK .. PLZ LET ME KNOW

I GOT : got two pots.. a smaller like in pic .. and a bigger one.. the guy ( who said he grew bomb for years ) suggested that for my setup i get fox farm happy frog soil.. because it has nutrients in it and basically everything you need..and he said the best light for my set up was a .. Mini Sunburst 150 Watt HPS .. he said that for 1 plant .. this is all i would need since its a really good light .. he also said i would be able to use this one light from vegetation through flowering ( of course itll change from 24 hours on to 12/12 when flowering but i thought you needed different lights at different stages? idk tho )
so basically that's what i left with..
see the pics on how i set it up..
now i have a tahoe og plant growing.. i live in los angeles so i just got my clone from my local dispensary.. its female for sure..
i put soil in the pots .. then planed my plant.. the guy told be when the roots star growing out the bottom of my smaller pot .. to switch to bigger pot..

i just want to know..
will this work as he said alone ? or do i need to be adding nutrients.. and also he never told me anything about my ph ? ive just been watering with bottle water mixed with tap water .. i know it needs to be a certain ph to even recieve the nutrients ..
plz help, i know my setup will work for just one plant ..
or what do u suggest ..
* plz keep in mind i dont have lots of money.. i just want the simple necessities .. .plz ..

i havnt much experience with lights but, whats the temp in there? cool setup

I'm curious about the heat in there as well. But, all in all, you could have a decent low-budget grow. HF soil should be enough for 3-4 weeks, but some inexpensive nutes for growth and flowering are a good investment beyond that. Now, some basic common mistakes to avoid are: don't over water or feed. With water, do so when your pot is about 70% dry. With feed, do so at 25% of the makers recommended rate. For this grow don't be concerned about PH. HF soil and tap water are fine. Regarding flowering, keep in mind two things: 1) expect your plant to "stretch" around 30% or more during the flowering stage, so you don't want outgrow your available space. And, 2) don't make her flower until the preflowers make their appearance.

About that heat again - try to keep your temp around 75° in that box. Finally, when its time to flower try to get them in 100% darkness in their dark period. Fairly simple, yes?