If you practice running script again, you should practice Wang Xizhi's running script. The running script doesn't say that it is named or abbreviated as "so-and-so" like regular script. Generally, it is a "post", which is one of the works of a calligrapher.
if you want to get started with running script, you must start with classics! Wang Xizhi is known as a "book saint", and Preface to Lanting is his masterpiece, which is praised as "the best running book in the world", and it is also the best introductory post for learners with a certain foundation. After learning this post, you should have a certain appreciation of the running script, and then go to the bookstore on the market to look at the posts of famous artists in the past, and choose the posts you like and taste. Choose a few more, and then find out the key exercises that you are familiar with and suitable for yourself, and integrate other posts in order to form your own style.