I agree with the previous poster about researching the individual journals. Wikipedia, of all places, has a very large list of theological journals and periodicals (see
en.wikipedia.org/wiki/List_of_theological_journals).
Also, as someone with experience selecting and editing articles for a scholarly journal, I have a few more points to add:
First, you will want to make sure that all of your submitted pieces are well researched and cited. Credibility is one of the main things that editors look for across the board, and, since you’ve never been published before, you will want to be especially attentive to this. Additionally, make sure that the citation format you use is the same as the one the journal currently uses. This may be on their website, or you might have to read some of their published articles and follow the same format.
Second, you will want to, if at all possible, associate yourself with an academic institution. This goes to credibility, and will dramatically increase your chances of getting published.
Third, you will want to make sure that your abstract, introduction, CV (if required), and cover letter (if required) are absolutely flawless. Some journals receive hundreds of submissions a day, and the editors cannot read them all. Instead, they will only read these parts of your submission to decide whether they want to read more. You don’t want your article to be one of those “hidden gems” where the real novelty comes out in the middle of the analysis – make it known from the beginning that your submission is special!
Finally, if you are not published, don’t give up. In this modern era, there are many other ways to get your work out there. For example, you could start a blog (which might actually have a broader readership), or create a profile on the Social Sciences Research Network (SSRN), which is a popular place for authors to get their work out there and noticed. Also, don’t forget about submitting your work to online journals and magazines. These will be much more open to accepting submissions from a previously unpublished author.