Though i personally feel this is off topic discussion since it does not directly relate to gambling or gambling discussion, i will still go ahead and tell the five things i would do first if luck shines its light on me and i win a big amount of money in my gambling activities.
First and foremost, what i will do will have to depend on the amount of money won since "Huge amount" per say mean different amount for different forks depending on their individual current financial situations or circumstances, for example, a $1000 might be a lot money for some one who has never touched $500 before whereas the same $1000 will be a very tiny amount of money for someone who have been counting in tens and hundreds of thousands of dollars, so for me personally, i would consider $50,000 upwards as a huge amount of money.

Here are five things i would do first if i won $50,000 upwards..
1. Reserve 5 to 10 percent of that amount for my continual gambling activities.
2. Pay tithe to God who made the winning possible for me.
3. Start a good business.
4. Buy at least an hectare of land property or more for a future business.
5. Move out of rented apartment to my home, as well as keep investing in Bitcoin and other good crypto projects, and also invest more in real estate.

Buying a car and living a lavish life will be the last thing on my mind, since ive lived such live before and i already know there is absolutely no gain in it.