Here is the roadmap for crypto creation:
Decide whether to develop a blockchain or choose an existing platform (e.g., Ethereum).
Create a whitepaper for the project.
Decide on the consensus mechanism (if you’re building your own blockchain).
Design the nodes for holding the information on your blockchain.
Integrate APIs (application programming interfaces).
Design applications to integrate with your blockchain, such as cryptocurrency wallets.
That’s how to create a cryptocurrency. These steps require a significant amount of knowledge and effort, unless you are planning to use platforms like Ethereum to issue tokens.