[mezalaja]

Try your best to let the bike float underneath you is the best way I can describe it

Great way to describe it!

If you are too stiff and rigid the wind could push you across lanes (I know cause it's happened to me!)

Picture yourself walking down the sidewalk on a windy day while holding a sheet of plywood. If you hold the wood from the bottom and the top it would be very difficult to hold a straight line. If you hold the wood from just the top, the bottom might swing but you should be able to hold your line.

On windy rides I let the bottom of my bike "float" underneath me and am able to hold my line by leaning into the wind.

Hope it helps!