Easy to understand bitcoin guide for a newbie?

After years to paying too much rake at my favourite poker room and losing 6% in charges every time I use a credit card, I've finally decided to buy some btc and try some bitcoin sportsbooks and poker rooms. The problem is, I'm a bit of a technophobe so I have absolutely no idea where to start?

Are there any really easy to use apps where I can buy and sell bitcoin from the USA?