Read some guides and get any useful information that you could get,
But the best way on learning is by experiencing you could start with just a small amount just to begin in it.
Guides in the sense you mean Youtube videos and articles right. I believe beginners can make them better with the videos itself. When I was started to learn crypto currency and even trading I have use the youtube as the resource.
First I have started with the Localbitcoins since that to now it is really easy to understand with the youtube videos mate.
If you want to make your better on blockchain and bitcoin. You have go with the book called mastering in bitcoins.