Though, you need to train to adjust your own microphone
It's not so easy to hear your own voice with a delay in hear plugs but it will give a good starting point.
Don't forget to do all as if you were really streaming : type on your keyboard, move around, start lush domi whatever you're using...
to find out what are exactly these parasite sounds they tell you about : "a lot of noise" seems a bit strange.
They mostly say "distorted", "saturated", "much too loud" or "too low"...
(Also the feedback from users can give you different advises depending on their own devices)