Dip your toes in the waterIf you dip your toes in the water, you try something tentatively because you are not sure whether it will work or not.
Brush under the carpetIf you brush something under the carpet, you are making an attempt to ignore it, or hide it from others.
Early to bed, early to rise, makes a man healthy wealthy and wiseIt means that sleeping well and not staying up late will help you out physically and financially.