Help me with generating some images for a meditation centre

Design details: I need someone who can help for this project and on an on-going basis to generate images for our website and Facebook Ads, as well as other ad-hoc bits.

For this project I just need an image creating for use on Event Bright. These are the requirements as per Event Bright :- we recommend using at least a 2160x1080px (2:1 ratio) image that's no larger than 10MB.

I was thinking that an image similar to the banner we have on this page would be good http://meditateinhuddersfield.org/tuesday-evenings

I have put the budget in at £20. For future work I am happy to pay more if there are several images we are creating, however, given this is simply one image and I can pretty much tell you what I want, then I have set the budget quite low.
Ideas for the visual style: Like what we have on our website page listed in the details
Extra notes: