I’ve never used RenderForest to create a logo. I did use that website to make my video intro/outro. I would highly recommend getting in contact with @baptisttadg for a custom logo. You’ll get all of the files you need and it’ll be done in a timely manner.
Dividers need to be images on a transparent background, saved as a .png. Otherwise it’ll just turn into a white background disrupt the flow of the image. I have a feeling the artist could also make those for you. Would be worth investing into those, although making yourself is an option too.
I understand, then I will continue to use it like this for now. In the future, I will contact the person you mentioned and have a logo designed for myself.