It is much easier: again see what is described in the link:

Lisk Nano 1.3.1
In an effort to further raise awareness of this basic blockchain procedure, we have added the Lisk account initialization feature to Lisk Nano 1.3.1. From this version onwards, account holders with no public key cemented in our blockchain will be reminded to activate a transaction to add this additional layer of security. Please download the latest Lisk Nano version and check if this applies to you.