What I am looking to do is soft fork on litecoin and create my own coin! I know that I need to make a node but I can't find any process that shows me how to create my own coin.
Soft forks are generally used to upgrade an existing protocol in a backward compatible way. If you were to create a new coin you would need to hard fork the Litecoin protocol. How you do that depends on your motivation. If you just want to create a new coin to make money I would strongly advise against it. There are thousands of altcoins that have no unique selling proposition. It sounds like any coin you would make would also have no unique selling proposition.
If you want to experiment with your own network I would recommend looking into Signet.