new to appian

Check this out: https://kunalsharda.com/2021/06/18/appian-certification-program/

Join the Appian Academy and follow the trainings. Get yourself a Community Edition Appian environment. Use the extensive documentation including the tutorials.

Check this study guide from appian community.appian.com/.../associate-developer

Follow this link -community.appian.com/.../ and select the domain you would like to proceed with. 
Also, here are some resources that can help you. 

1. community.appian.com - To ask questions, search for answers or to help other people. 
2. academy.appian.com - To browse through a rich collection of video lectures. 
3. docs.appian.com - Heavy and intensive documentation of everything that you can think of.