Mining your own CryptoCurrency question.

[Goodmens]

I have a friend who mines cryptocurrencies such as Bitcoin, BCH, ETH with P106 cards, and was interested in mining myself. I would like to know what the process is to premining your own POS cryptocurrency. I've heard of people instantly mining their own supply fast and was wondering how people did it. I eventually would like to market it myself and add it to exchanges. I have a good amount of following on social media in the cryptocurrency space, just not as much on here. I have great ideas on how and what the coin will be used for. Any help would be great! I've looked into cryptolife and it is out of my budget, and I've also looked into waves, but I don't like the idea of transacting and having to pay in waves.