To develop your own blockchain from scratch you need people with big brains or who are slightly autistic like rainman.
You can create an ERC-20 token easily however:
1. Create email address, website, twitter and whitepaper
2. Create your token here:
https://vittominacori.github.io/erc20-generator/
3. Signup with etherscan.io and complete all details for your contract you just created in Step 2.
4. Promote the hell out of it and make billions.
Forking an existing chain is nothing like developing your own blockchain from scratch. It is a whole different ball game. The mathematics behind the creation is frightening frankly. Also you get the coding wrong and you end up with what happened with
Ethereum where a hacker exploited a programming vulnerability and stole 50m
Ethereum. Ethereum had to then fork and become ETH and the original hacked chain stayed as ETC or Ethereum Classic remember.
I have created my own ERC-20 token so I know what is involved and its a 1 man job.