Hi @Kc1983 ,
@JoesIdeas has provided some fantastic advice below but I just wanted to confirm that no, you are not required to use DSers or any dropshipping app if you do not wish to. Dropshipping apps are designed to help merchants import products into their store and place orders with suppliers, but they are not mandatory in order to run a dropshipping store on Shopify.
I’d recommend checking out our Ultimate Guide to Dropshipping to learn more about this method of selling and how you can make a success of your online dropshipping store on Shopify.