How to transition from design to a more software/modeling based role

I've been a mechanical engineer for 8 years now and I'm finally coming to terms with the fact that I just hate mechanical design. I have an MSME in fluid dynamics and have been specializing in fluid/thermal analysis and design but I just don't enjoy it at all. A job I had a while ago that I did enjoy involved some programming, modeling and simulation with simulink, and data analysis. But that role was temporary. I think what I'm looking for is along the lines of "system modeling" engineering, or something like that.

I'm considering starting an online MSCS and trying to use that to apply to some more software based roles. Or maybe trying to somehow get into controls engineering, but I'm not sure how I would go about that.

Any advice on making this transition? Thanks