It sounds like you are pretty new to gear and pretty new to fitness in general. 1 kit is 100iu. Each vial is 10iu. You would need to use it several months at 2 or more iu to see some fat loss results. It does not require PCT as gh is not AAS. It does not effect your natural test production. Helios is a fat burner. Its a combo of clen and yohimbine. These are also not AAS and also do not require PCT. You can actually use both things at once, if you wanted to push results further. Instead of helios, you can also look into clen, which is an oral tablet and will work in a similar fashion as the injectable yohimbine and not require ED shots. 

On a scale of 1-10, 10 being the most beneficial thing for fat loss, I would rank diet as a 10, GH at a 3 or 4, clen or helois at a 6. For fat burning along, GH may not be the best option. It will help, but you can get faster results with clen, along with the right diet and cardio plan. If you want to take it a step further, look into running a low dose of anavar for 6-8 wks, while at the end of your diet. Var will require PCT as it is a steroid and results in muscle change will be much more dramatic than without, especially if you are on the right diet and using clen