Need help with soil mix / feed

Basically im just growing 1 plant from seed , its a big buddha cheese so shouldnt be too hard right ?
My plant is currently 2 weeks old and is about 3/4 inches tall and and is in a 2 gallon pot using 50% soil 50% Perlite .

Questions are :-

:How much water per day should i feed it and at what times are best ?
:Is the soil mix alright lol ?
:Im using a 125 watt eco light grow light , is this enough and does the height away from the plant matter ?? and if so how far away ?

Quite new to growing so what to know what works and doesnt . thanks for any help :)

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