To elaborate just a bit, there is a mountain of hypothetical concerns. What-ifs. Just worry about the most basic of them. Like, committing to being in two places at one time obviously won't work. Beyond those basics, just plow forward and figure out all the other stuff as you go. My experience is that the other stuff is surprisingly doable. Doing two different things (of any kind) for two different jobs is essentially the same as doing two different things for a single job.