Creating a coin for the sake of building a coin is doomed to fail. It needs to have purpose, it needs to add value to the world. Once you have purpose you need to build a ‘community’. This is a following for your cryptocurrency. Maintaining a crypto community is hard work, so pay a good amount of attention to this point.
Tools
There are different platforms which help in creating the tokens. Waves, Byteball offer the capabilities to issues your couns at a click besides the ethereum platform. Technically, you would see a lot of tools but there is a need to understand the buyside economics. When you would issue coins, somebody will have to buy it too. You need to create compelling reasons for buyers to purchase
Capital
Coins can be successful only if there are use cases or applications. To fund innovation, you need a good amount of capital. Additionally, the capital is also required to provide liquidity in the market for those who would be willing to sell their holdings. Typically a figure of $25000 would be sufficient.