That is really big winning and only a few people can win that much money. Most of them will deposit more money and try to recover their loss. That makes them lose too much money if they don't realize what is happen to them.
Yes, controlling the emotions is a must for gamblers, not just you especially when we win the big money. That is because we may want to repeat the games so we can have more winning but that will not happen easily.
So congratulation for your big winning and I hope I am behind you so I can get the big winning too

I don't think so, if they are out there luckier than me but I'm here to be honest that to reach $500 with a capital of $12 is very difficult. The reason is because we need to manage our emotions so well on the bet button where we raise the bet and lower the bet when each spin there is no profit that we get.
That's an example, patience and a game pattern that is more dominated by a calm mind will make us wiser in gambling slots.
I think if you are an active slot player you can achieve big wins in the following days. Prioritize fun and also prioritize victory and don't forget to withdraw it if you are satisfied with the victory you get at that time.