This is the way I used to do kits way back.
Have your ferementer cleaned and sterlised.
Fill up the kitchen sink with hot tap water.
Sit the extract/kit tin in the sink for about 5-10 mins turning it upside down about half time.
After turning the extract/kit tin fill the jug (around 1.7 litres) and turn it on.
With your cleaned and sterlised fermenter on the bench.
When the jug has boiled open the extract/kit tin and pour into the fermenter. Add about 1/3 of the jug to the fermenter. Add a small amount of hot water to the extract tin and swirl. Let it sit on the bench.
Using one hand stir the mix and add the sugars slowly.
Add a little hot water as required.
Tip in the remainder of the extract/kit at the end and fill the fermenter to volume with cold water and any remainder hot water.
At my place the cold tap water was the right temp to give a full fermenter temp of around 23 deg C.
At your place you may need to use the cold towel, frozen milk bottle, fan tricks to get the temp down a little.
Pitch yeast, sit back and have a brew.
HTH,
Doc