I am not looking to build a casino, I know that costs a lot of money. I want a simple website like freebitco.in in the start or like faucet crypto but with a dice game incorporated.
FreeBitco.in is a bitcoin casino. And, with all of its features, I wouldn't call it a simple website.
As you said, you want to enable users to withdraw in other currencies as well. I would warn you, though, that this may add an extra level of complexity since you will need to incorporate various blockchains and APIs if you want to automate everything.
Well, some years ago, it was a simple faucet it only had the roll, the dice and the ads. Like other faucets.