As the title says as someone who is not good at drawing it can be difficult sometimes to explain how someone looks. Well I’ve found a few online character creators which produce some really nice results.
I hope this helps
Please be aware you cannot use these specifically in a game unless you speak to the creator and gain permission. You can find their contact details on the linked website.
Just use them to show artists how you visualise a character and let them use that as a guide to make original art.