Illustrations and cover design for an isekai English light novel

I have recently finished writing the first volume of an English light novel with isekai, fantasy and adventure themes. I am currently looking for someone to produce 8 or 9 gray-scale illustrations in traditional light novel format, as well as a colored cover design. I can provide a description of each scene, in addition to the salient aspects that should be included. I am willing to allow a certain amount of artistic liberties. For each illustration, I am prepared to pay up to 65% of the cover design cost. For anyone interested, it would be helpful if you could provide examples of your previous work. I have made some very rough approximations of the relevant characters and objects using existing images and Photoshop editing, two of which are included in this proposal. I have also included the overview of the story below.

'All I Need Is My Beloved Buffer':
Tauron Siegwell is a ‘Buffer’, a fairly rare support class. Unfortunately, he’s registered as only being Rank E, making him one of the weakest adventurers. As a result, he can barely make ends meat and is constantly bullied by the rest of his party. However, his life takes an unexpected turn when he meets fellow Buffer Meika Yoshii, an eccentric girl and self-proclaimed ‘otaku’, whatever that means.
Thanks to Meika, Tauron discovers that they are both really Rank A, the second highest Rank, and possess incredible powers, especially when they work together. With Meika’s encouragement, Tauron decides to leave his party and form a new one with her. As they encounter new challenges and make new allies, a powerful friendship and potentially a budding romance begins to blossom. But are their feelings for each other strong enough to overcome the trials ahead?