Hello.
I am a creative web developer with 4+ years of experience with WordPress. I can help you customize the template you chose to fit your requirements. As I understand, it should have a look similar to the one on preview you gave in project description - clean design, no garbage, only things that matter to clients.
In my view, the most important part of the design for you is graphics. You will need high-quality images for background and some unique icons for 'How It Works' part. I have a few gorgeous resources just for projects like yours, with high-res images and a separate resource for icons.
Few words about a color scheme. Blue color is always a winner for job-finding websites (and Freelancer is not an exception here), so you can easily go for it. In addition, you could look into shades of Ochre color - you can make a good match with those two.
Anyway, let me know if you're interested in working with me.
Hope to hear from you!
Thanks,
Victor.