The preferred setup to fork a new coin from Monero is:
- a Linux system, with enough memory (4 GB should be enough, more for parallel building), and a fast SSD (well, for Monero it's a must, but a fork will be fine with a HDD since you won't get the traffic when you start out).
- a set of programming tools, including a C compiler, make, cmake, etc.
- The dependencies mentioned in the README.md file, which you've no doubt perused already.
- the source from https://github.com/monero-project/monero
There are two pool codebases which you'll want to adapt:
The original one is at https://github.com/zone117x/node-cryptonote-pool and used by most pools still. It uses redis, as you'll find in its well made README.md file.
A new pool codebase is at https://github.com/Snipa22/nodejs-pool.
For an explorer, you can start from https://github.com/moneroexamples/onion-monero-blockchain-explorer
With all these tools, you'll be ready to start development in no time!
You then have two basic paths ahead:
- the hard way: you can pour a lot of time and work in your fork to make something useful and attract people to your innovative changes
- the easy way: you can pour a lot of time into making it seem you have something shiny while neglecting any substantive work on the fork, and attract suckers who don't know any better - worked short term for many people before
Good luck, and may you choose wisely.