Hi theantal,
I'm interested in working on this project. The way I see it, the jobscope for this project is quite narrow, so I won't be bidding more than $30. However, I do want to check with you: when you mentioned 'Editing the background of the Headlines', do you mean to change the green background of the text that overlays the image gallery?
As for some live works, you can check out my portfolio site ([login to view URL]) as well as the latest design I've finished ([login to view URL]). you will find that my strength lies in clean, fresh and minimalist designs - which coincides with the theme you're thinking of purchasing (or have purchased). As such, I will be an excellent candidate for making the small changes to your theme, yet at the same time maintain the minimalist tone.
Finally, thank you for your attention, and I look forward to hearing from you soon.
Cordially,
Anthony