No, Xiaogan dialect belongs to Chinese dialect, which is a variant of Chinese, while Sichuan dialect is a language of Sino-Tibetan Tibeto-Burman language family and an independent language of Chinese. Xiaogan dialect and Sichuan dialect have great differences in pronunciation, vocabulary and grammar, so they can't understand each other.

If you want to learn Xiaogan dialect and Sichuan dialect, you should first understand their language characteristics, and then be familiar with their pronunciation, vocabulary and grammar. Finally, you should practice and accumulate more to master these two languages. In addition, you can learn by listening to recordings, watching videos, translating, etc., and you can also find local teachers to guide your study, so that you can better master these two languages.