Hi Volya, welcome to Permies.
Nice project! So you start from seeds?
To play safe, i'd start the seeds indoors, because then you have less snails or rolliepollies to immediately devour your seedlings.
If you can't or are not allowed by the rules of the school.. Then that's challenging. Best to check locally how others small scale growers do that. Because they'll know about the
local problems you face... Some things are global, but others impossible for me to know..I'm in France, you could have
voles or nasty little bugs i don't even know exist, but locals will know the hic-ups.
Cause your place where you growing is lacking a diverse eco system to balance the insects/diseases etc you'll have to get a good feel for what healthy plants look like and that's not as good as you'd think.
They'll probably grow like crazy if you add all that compost and overwater them, if you get past the first phase. Normally that attracts bugs, aphids loovvvve these superfast growing plants.
Of what consists the compost you're adding? Is it manure or plant waste the
city provides. Is it fresh or a bit older?
Are you planning on really digging it in or just spreading it on top?
Do you have good hand tools?
Are you fit?
Do you love getting up at 5 in the morning and be at school at 6 to work when it's not hot.. Can you have acces?
Stop laughing, ;)
I have a project with a polytunnel. I individually water with a wateringcan, i train plants to look for water deeper in the soil, or force them to make connections with the soil food web. Safe the seeds from them that can and use that or seeds i got from trades.
But i have diversity in my seeds, did you get that a bit?
If you force plants to grow less hard at start, they'll have to look a bit further and might find other stuff than N P and K, they need all sorts of minerals to grow robustly and not too fast. But that's quite difficult and means checking, checking ,checking in your superhot climate.
I'd first toughen them up a bit and then grow them faster, maybe use some of that compost later, mix it in buckets and put it at the plants that really need it.
ANyway and however, you'll make tons of mistakes and that's when you learn really.
Great oppertunity!