Sichuanese : any tips to learn some vocabulary?
You can start by watching some TV shows, for instance:


下课了，要雄起
戳锅漏
傻儿司令
耙耳朵的幸福生活


Most of them are subtitled but more dialectical words will be translated into Mandarin in the subtitles.



There are also many books


四川方言日历(2019)
漫画四川方言
老成都漫画系列:成都话
Chinese Lessons For First Year Students in West China by Kilborn, Omar L. (Omar Leslie), 1867-1920
Western Mandarin or, The Spoken Language of Western China; with Syllabic and English Indexes by Grainger, Adam


and dictionaries:


四川方言词典
四川方言词源
成都方言词汇
成都方言




Nothing, though, beats spending time with actual native speakers and interacting with them.

Some of the most common words include:


巴适 = 很棒
安逸 = 舒服
牙尖 = 八卦
雄起 = 加油
洋盘 = 洋气
子 = 干嘛
将就 = 凑合
摆龙门阵 = 聊天儿
宝器 = 傻瓜
耳朵 = 妻管严


There are many lists online too like:


标准四川话300句
四川话怎么说，经典四川话，常用四川话大全