That's ok and totally understandable. Summaries seem simple, but so much goes into making them decent It doesn't sound bad, just sounds like you are still working on it which makes sense as you are :). What I think will help a lot is honestly just keeping at the development of your comic. As you flesh it out, keep coming back to the summary to see what you can subtract, add, and streamline till you have the gist of what you are trying to show.
I like the idea of having a side comic, but know I couldn't swing it, haha, there is always later though!
I'd also recommend maybe trying to have multiple types of summaries to get yourself more comfortable with telling folks about your story (it's also good writing practice). I keep a couple of different summaries on my phone for my comic to use depending on where I'm posting or who's asking. I still edit mine from time to time, but keep the core the same.
One that's super short and snappy: A plus-size lady mage shut-in learning to spread her wings at magic college alongside a diverse cast of fellow mages.
Another that's a bit longer and used for about pages: New adult fantasy comic that follows a plus-size shut-in mage named Junah leaving home for the first time to attend the Institute of Mystical, Magical & Mythical Arts where she meets her new partner Kaelen, a wizard of sorts who likes personal space, and the rest of the crew at IMMMA who are all trying to get a grip on what it means to have an unyielding mage gift.
And then one that belongs on the back of a book lol: MagicalMashup! is a New adult fantasy comic set in the magic filled world of Magos. Follow Junah, a 23-year-old plus-size compound mage shut-in leaving her home for the first time and Kaelen, a wizard of sorts, who likes his personal space and a few other magical misfits at the Institute of Mystical, Magical & Mythical Arts (IMMMA).
IMMMA is located at the heart of Lufiriya; a melting pot of beings from all across Magos that coexist on the land forged by the heroes of old. Lufiriya is the bridge that connects the enchanted lands of Encantia that are filled with the essence of magic and where mage skills are practiced and encouraged, with the practical lands of Corporea where the inhabitants chose to leave magic behind in favor of developing approaches to science and technology through more pragmatic means.
That's just my 2 cents though