STAR questions Chicago Midway

Hi all. I might attempt a flight from Ann Arbor KARB, to Chicago
Midway KMDW in a few days.

I have a question about the Midway Cicero two departure. There is an
"obstacle" and a "vectors" version of this DP. Lets say I get that DP
as part of my clearance, with a departure on runway 4R. The obstacle
DP say "North bound departures assigned headings 360 degrees clockwise
thru 080 degrees fly runway heading to 1.2 DME, turn right, climb on
heading 100 degrees until leaving 2400, thence via tower assigned
hdg/vector to assigned route." The victors DP say the same except no
mention of the DME.

I'm curious how this works and how tower would likely issue my takeoff
clearance. But what if my assigned heading is 150 degrees. I guess I
ignore the part of the DP that wants a turn to 100 degrees. But for
obstacle clearance I do runway heading till 1.2 DME before tuning to
150 degrees.

If my assigned heading is 040 degrees, I would fly rwy hdg till 1.2
DME, turn right to 100 degrees until leaving 2400, then turn back to
040 unless I get to 2400 feet before 1.2 DME??

Lastly, how would tower likely phrase my initial instruction? Seems
this would be a good candidate for putting NO DP in the comments
section of my flight plan! ... Aaron