Strapi v3.0.0-beta.18.6 to switch to any new version

Hi, as I mentioned in the title, I am using Strapi v3.0.0-beta.18.6 for my mobile application (as a RESTful api). At first things were going well, but later it started to be insufficient (slow data loading). And finally I decided to upgrade, but I have no idea how to proceed. I’ve looked through the strapi documentation, but I’ve had a lot of confusion. Frankly, I’m a little afraid of my application being disrupted. The reason is that the endpoint for the Restful api has changed in the last strapi version. To summarize, how can I switch data in my application without a hitch, is it possible?

Thank you.