Traditional crocheters would prefer weaving in yarn ends in order to switch from a yarn to another. It is thought to be a better method to change yarns and continue crocheting. However it sometimes may be a challenging process to swtich between different color yarns when crocheting.
If you are looking for an alternative way to change to a new colour yarn, you can watch diy tutorials on youtube to better understand the process. Without any challenge, you will be able to switch between different colour yarns by trying these type of alternative ways.