π Question:
"I never had testimonials and those who didn't ask me didn't seem to have that interest than those who had proof. Even if I try offer them service for free I still can't manage to tempt them enough"
π Answer:
Everyone starts with zero testimonials and zero experience, this isn't some impossible problem.
Prove yourself by sounding like you know what you're talking about, providing free value (that's actually good), helping them, and get your foot in the door with the first client.
Don't ever offer to work for free. No professional devalues their time like that, so offering to work for free comes across as needy to business owners.