I hear you on the "aimless" feeling. For me too, it was just really hard to be motivated to make anything that wasn't comic related because it didn't feel like I was going in the right direction otherwise. But learning/practice can be so beneficial to your goals, so I hope you find some that get you excited.
There are some absolutely great suggestions here on the work side of things- so I'm just going to dip into more of the personal life bits that help me when I have feelings similar to these.
First, do your best to get into a good habit (whether it's sketching, stretching, exercising, going for a walk, grabbing a cup of coffee or tea (or any other sensory bits that bring you joy), meditation, what have you. Make active steps to walk away from the slumpy feelings and do something that invigorates you.
Second, try to open yourself up to wonder. Be a scientist and see how such and such an artist makes their art work for you (in terms of appeal, action scenes, emotional scenes, etc) and find a way to emulate it. Or, away from art, it could be reading more on a subject that you're curious about, trying your hand at a musical instrument, cooking, etc.
Third, continue to boost others. The easiest way to get out of your own headspace is being there for others. It's one reason why I love this community. The sharing of time, talent, and heart is so stink'n awesome.
Be well. You do you. I've always appreciated and loved your energy here.