Full offense but beggar really cannot choose. I advise you to think through your plans once again.
If you really aim for publication with "high-quality" outcome, I suggest you to invest some money in it. Nothing can be achieved without sacrifice, it is an investment after all.
If your story is really that good you deserve a good art. Good art just like a good story needs hard work and effort to make and perfect. Thus, it is only fair to give your artist some adequate compensation. Money talks, and value your shit accordingly.
Art is hard and especially harder if you are not doing it for yourself, including as fulfilling meticulous demands from people. If you want professional-grade art, offer professional-grade compensation. So it is fair that both sides has equal things to lose when things go south, or equal gain when things sail smooth. Give equal respect to who you are collaborating with.
I also suggest you to link your previous work or at least talk about your idea a bit to entice people. How can anyone know how brilliant your series is without knowing much about it? You are here basically pitching it for people to draw it, do some job attracting the artists.
It is also makes you more credible if you have a finished work to show, because some collaborators are first-timer with high hopes that lose passion halfway and quit when things does not go that way (e.g. it flops).
Also, dear novelist: There is no fucking demands or mandate that your story needs to be a webcomic ASAP. You can stay on your lane writing novel (which is nothing bad and there are some successful novels adapted into webcomic if you want it so badly). You can also wait, earn money or trust of the community, and hold a respectful collaboration with artists.
