To be honest I do not know a real safe way to do this, the only method I know is doing signature campaigns, and that one is the only safe method because it has no risks.
Signature campaigns can be very profitable and its safe and you are also learning from it.
You are newbie, otherwise most of the ways are safe to grow the bitcoins, but you are right saying that signature campaigns work is totally safe and it has no risk. But you know risk is a part of every business, and also we all are doing business and make money, even to know that business is risky field. Only one thing keep in mind that to know the strategy and how can you handle your business, and same situation is here in bitcoin field.