Testing slot game features for free in Vietnam

Good afternoon folks, I am a complete beginner when it comes to online slot machines, and I really don't want to risk my hard-earned VND on games that I don't even understand yet. Modern video slots can have very complex bonus rounds, cascading reels, and unique wild mechanics that can be confusing at first. I think it is much smarter to learn how the paylines work using virtual credits before making a real deposit. Luckily, I found out that you can try out hundreds of popular titles completely for free in practice mode. It allows you to play and test the game dynamics as much as you want without any financial commitments. I spent the whole yesterday evening spinning Cleopatra's Fortune with virtual coins, and it was a great way to understand the hit frequency. Do you guys always test new slot releases for free first, or do you prefer to go straight into real action?