Yes, Its good Idea to study existing coins and clone same and understand how this network work. After having enough understanding about the functionality of any coin, Ideas will come to you and during that time you can immediately start your new project as you would have done enough work. Here are the few links which will help you to clone coin.


>> https://bitcointalk.org/index.php?topic=1200291.msg12625865#msg12625865
>> https://bitcointalk.org/index.php?topic=1119647.msg11861193#msg11861193 *
>> https://bitcointalk.org/index.php?topic=420896.0
>> https://bitcointalk.org/index.php?topic=363825.msg3893905#msg3893905
>> https://steemit.com/altcoins/@complexring/how-to-build-proof-of-stake-altcoins-and-stake-coins-on-a-remote-ubuntu-server
>> https://gist.github.com/mhsjlw/8130158de01071aa8c87
>> https://bitcointalk.org/index.php?topic=225690.0
>> https://cryptojunction.com/how-to-create-your-own-cryptocurrency/ *
>> https://github.com/Peershares/Peershares/wiki/Genesis-Block-%28Starting-a-New-Blockchain-Instance%29 **
>> https://steemit.com/steem/@marsresident/a-guide-to-cryptocurrencies-resources-to-create-your-own-currency

If you wanna get Overview about bitcoin visit this below link.

>> https://en.bitcoin.it/wiki/Bitcoin_Core_0.11_(ch_1):_Overview