1. the existing plugin does not support a caption so we need to edit and add instagram caption that will appear on all photos once click.
2. integrate and fix instagram in gallery and homepage with different #hashtag using existing plugin.
I would be happy to get this Instagram plugin working as you desire. I have worked with the Instagram API and Instagram Wordpress plugins in the past. I will send you a private message with further details.
I can change the current plugin to one which supports caption. Work will be done quickly, professionally. WordPress experts with more than 4+ yrs experience are here.