There are very many ways for this in fact. The most profitable and stable financially are becoming a freelancer or finding a distance job in a sphere where your professional skills are really high.
The other popular ways are for example writing reviews about certain services/products, blogging, making and developing your own website, online gambling, filling out online surveys, writing and publishing your own books, buying and selling domain names, Forex trading and its affiliate programs like for example AvaTrade partnership programs , cryptocurrencies and so on.

I'm an amateur player and I can say from my own experience that learning how to play golf demands time and practising like in case of any other serious sport game.
Golf can seem easy because of not so much physical activity in it but that's only a myth and you'll need to learn its basics carefully and practise really a lot and regurarly which many beginners don't like very much. But without this you'll never become a good golf player 
If you're so interested in golf, try to start from your local courses with good teaching pros which is extremely important for learning the basics like making various types of shots https://golfclubguru.net/the-most-common-golf-mistakes-by-beginners/. After findhing with the basics you can continue to practise on your own.