Need parts for Customizing a pc

I need this money to buy a couple of components

• A graphics card (something that no computer can go without)
• A dual ram stick (optional, but this would make the pc 10x better)
• And the pc itself, it will be a very bad dell optiplex

I’m challenging myself to make this a gaming pc, rather then buying a extremely expensive gaming computer. And if you just donate $10, this could be complete if only 40 people donated