Electrum is my favourite one. Download it, install it and experiment with it. You seem that you're new at Bitcoin and thus, I'd advise you not to buy if you haven't understood, at least, the basics. You're going to most likely lose your money. If I were you, I'd make my research, and then, I'd buy $20 worth of bitcoins from an exchange. Waste those $20 to test electrum and its functionalities.

There is another network along with bitcoin's, which is called "Testnet". It's similar with bitcoin and its units have no value. You can literally get them for free^[1]. Electrum offers you testnet wallet accessibility. You can easily find it with a search after the installation:

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[1] Testnet faucets