Depending on the type of collection - i.e. art, ear hats, pins, dvds, popcorn buckets, etc. - you might want to find a forum dedicated to those collectors. But to be honest, if you're not willing to put in the effort to sell it individually, you're only likely to get pennies on the dollar (assuming it's not just mass produced stuff nobody wants) from someone willing to go to the trouble of valuing it all.
Plus, based on where you live, while it is Disney central there, there are also tons of people amassing and then trying to unload their collections, too.
If you need to get the $ out of the collection, you'll have to put in the time to find values and sell over time (if any of it is worth anything). Or go to a collectibles show (once those start up again) and try and find a buyer or get a table and sell it yourself there. Otherwise, if you don't have a sentimental attachment to any of it and don't need the funds, you can donate it all to charity and take a tax writeoff.
But I'll note in general "Disney collection" can mean anything worth zero to millions. And no one will know what you're referring to unless you post more details and/or pics.