going to take another 6 months before they get indexed or is there any more secrets to getting them indexed faster?
In terms of getting it indexed quicker unfortunately there's not much that you can do. Ranking is a different issue. Optimizing your images will help. Here are some pointers for you; mentions of the picture topic is important, for example: renaming the file with the name of the topic, adding alt and title tags with the name, surrounding text with the name, URL and title of the page, and finally incoming links to that image page. Making the SEs understand what that image is about is key. In all that I mentioned renaming the file is probably the most important for image search optimization. Ranking in the regular SERPs would need more of what I mentioned.