Hi there, Kaeleb and welcome!
We have a subforum called Share your Work for exactly that, but you have to have 50 posts before you can make your own threads in there. It's a pretty easy goal to hit. We often recommend you start by giving some critiques of your own in there. It helps you get a feel for how the sharing section of the forum works and gets people aware of you so when you share your own work, they'll be happy to give back.
Your talk about talking with a publisher about your self-published books has me concerned. Typically, unless a self-published book has sold exceptionally well, a good publisher is not interested in it. The thing most publishers want is "first publication rights" which, if a book is already out in the world, are used up. However, there are MANY sketchy publishers who will gladly republish your work, often in exchange for your money and to no benefit to yourself. Yog's Law: Money flows towards the writer, not away from them. Youths and elderly are frequently targets of these places, as well as picture books and kids books. Please, before signing any contracts, use the Bewares, Recommendations, and Background Checks forum to look up the publisher you're talking to. If you don't see them in there, make a thread about the company, and we'll take a look for you. You do not have to pay anyone to publish your work, so if the topic of price to publish or buying copies of your own book comes up, leave immediately.