@SimPoseyYum, I'm not the creator of the challenge, but I think it'd be okay to save, change your aspiration, check for any changes, and reload. @katoregama has also said he's "not the challenge police", so I imagine he'd be okay with that. You wouldn't really be making things easier for yourself; you're just interested in seeing where you are.
I've noticed that some aspirations don't track your progress unless they're active. For example, the Bodybuilder aspiration won't show how many hours you've exercised until it's your active aspiration. When you switch to it, you're then credited for the hours you exercised before the aspiration was active. I had Carnegie switch to Bodybuilder once Painter Extraordinaire was completed, and all she needed to do to complete the first stage was buy a second piece of exercise equipment.