Just a guess, but your screenshot says the setting is called "aggressive vocal", which to me sounds like heavy compression. Is there a setting called "soft vocal" or something similar?
If not, try turning the ratio down - it's currently on 4.4 to 1. 1 to 1 is no compression at all, so make it somewhere in between, like 2 to 1?
The threshold sets the sound level above which the effect is applied. Try making this higher so only the loudest bits of your voice are compressed, but not so high that nothing gets effected.
Also it looks like there are wet and dry levels, with the dry level set to 0. This is basically the level of the sound with the effect applied (wet) and the level with no effect applied (dry). Try turning the dry up to get some of your uneffected vocals through. This is not usually done with compression, but if the control is there, try it out and see how it sounds.
Compression is one of those effects that can be hard got get your head around as to what it actually does. Took me ages to get what it was doing and couldn't really hear it to start with (not like, say, reverb where it's obvious what it's doing). But basically, imagine someone with their finger on a volume control turning it down every time there's a loud bit and back up again when it gets quiet. They do this really, really quickly, often many, many times per second. This squashes - or compresses - the sound volume down so it can be turned up to sound louder in the overall mix as the loud bits are no longer so loud. It often gives things a fuller sound but can make your ears tired when there's too much compression. It's why TV adverts are often louder than the main programme as they've been compressed to death to make them stand out.
Anyway, I guess it's a case of just moving a few sliders and hearing what happens (which can often be subtle), but easier when you understand what the sliders actually do.
Hope this helps and please keep us posted with how it goes.