Introduction to Cryptohack
"CryptoHack is where your cryptography journey begins — with puzzles that teach, challenges that excite, and a community that grows with you."

In introduction, you are going to learn about basic encoding, encrytions and how to solve a challenge. First you will solve basics challenges like base64 and then you move on xor releated challenge. XOR's are one of the most used concept in cryptography.
I had solved challenges, if you get any problem while solving a challenge, you are free to use below writeups as refrence.
(If you have any type of query / Question / suggestion .. feel free to ask below. We would be happy to connect you. Have a great day buddy!!)