As on most challenge sites, there are some beginner cryptos, and often you get started with the good old caesar cipher.
I welcome you to the WeChall style of these training challenges :)

Enjoy!

AOL XBPJR IYVDU MVE QBTWZ VCLY AOL SHGF KVN VM JHLZHY HUK FVBY BUPXBL ZVSBAPVU PZ NVJVPIVJHTMY