Well I don't know to much about CS2, so as far as tech advice, your out of luck with me.
However, the map looks good. Lots of variable areas, a couple of big open rooms for battles (the ending room looks great for a boss battle), and its clean and pretty straight forward.
Only thing i would add would be little texts on the stair areas to depict if they are going up and down, and lables for the colored sections as well. (I'm assuming the blue is water, but the green and brown areas are a little unclear.)
Though you as the DM will know since you made the map, making the notes should help the players be able to picture it at a glance with having to guess or make assumptions (which could end up being wrong.)
Looks good so far though! Keep up the good work!