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 a newbie so i dont know how you about signature campaign earnings,good or safe,may be this is your alt but i dont agree signature campaign can only provide a helping hand in the earnings,but to grow you must have some skills to earn big amount of bitcoins.
starting capital from your signature earnings is possible but maybe much better save at a month of your earnings before to start the real trade invest your time to read more about those trades techniques and strategy would help us a lot don't go and rush in time will help us to understand if your saving already enough you can start with a knowledge to make your coins grow more.