Yes—DD-X should work well with Acros 100. For starting times, check established film development resources such as Massive Dev Chart or FilmDev, which list this film/developer combination.

For contrast control, development time is the main variable: longer development generally increases contrast, while shorter development reduces it. There usually isn’t a single universal chart that precisely maps contrast to time for every setup, because agitation, dilution, temperature, and personal process all affect the result.

A useful starting point is the Acros datasheet: its characteristic curves and G-bar vs. time information can help you estimate how contrast changes, even if it doesn’t list DD-X directly in the exact way you want. Based on the shared guidance, a rough first estimate at 20°C is that adding about 2 minutes of development time may increase G-bar by around 0.1. Treat that only as a starting point and fine-tune with your own tests.