My advice, for what it's worth is take your time and do it a bit at a time,practice with your shot weighting and the pattern of shot placement.
If you have something like an old plasticcola bottle in the house, cut the top off to the shoulderfill it with water and set your floats up on a lengths of line.
The smaller the shotspread down the line(shirt button style) slows the rate of the line going through the water.
If you want your bait to get to the bottom fast, put you shot nearer the hook.
The shoteither side of the bottom of the float, if your fishing waggler style can be any size,they are usually there to hold it in place.
I prefer to use a float rubber.