Although I'm not Wiccan, I'm pretty knowledgeable of Wicca and it's theology.
Wicca firstly, doesn't have the concept of hell, at least in it's most common and popular forms.
Yes, the Witches Bible does state this. This book is only one of many Wiccan opinions, and should not to taken as law or literally. However, very few Wiccans actually believe in the Christian Hell to begin with.
Even the mention of the Old Religion is dubious, given Wicca was founded in the 50s.
I wouldn't stress too much about it, especially if you are solitary.