Wei Bei has many inscriptions to choose from, such as stele, Zhang Xuan's epitaph, Zhang Menglong's epitaph, Yuan Huai's epitaph and Dong's epitaph, all of which are excellent calligraphy works.
If it is an introduction, it is easier to start with the epitaphs of Zhang Xuan and Dong. It is not recommended to learn the Wei stele style written by modern people.