@shiennar Great! By using the Solidify Modifier, you already got the slant of the wood planks ends for free;)
One easy way to separate the planks is to select all the vertical edge loops (in edge mode) and press V.
Select a plank and press F to fill both sides at once (you’ll need to have the F2 addon enabled for that to work, I think).
Sorry if you already knew this, but others reading this might not;)
