Yes you indeed need to prove what you can do. Proofs are everything. You also need a photo of yourself, it makes you more trustworthy.
I get the impression when I read through your site that you just started freelancing, that's fine, but as a customer I might feel more safe taking someone with experience, so don't make it too obvious you are new.
As my plans will rise, I will relocate and travel more often
It seems you are not sure about what to do with yourself? How can I trust you don't escape my order then :-)
Don't let GitHub and Stackoverflow (that link doesn't work btw) be your profiles, take the content to your site.
Be a little more natural the way you tell about yourself, so it doesn't feel like a standard interview.
Try think of yourself as a product, you are the product that other companies wanna buy/lease to deliver a task. How would you make a website that sells a single product? Try convert those concept to selling yourself.
Make people believe you are the number one for task.