Ofcourse yes, I started getting my first Bitcoins thru freelancing. ZERO investment. From Freelancing, Signature campaigns, joining contests, bounty hunting, etc. There is no excuse to get bitcoin.
By the way, heres a powerful bitcointalk.org thread entitled, 100ways to earn bitcoin:
https://bitcointalk.org/index.php?topic=1777912.0thank you for ur kind suggestions. by the way which freelancing sites u prefer. as its very difficult from last couple of years for newbie to earn from freelancing sites.