Help!!

Okay, this is probably going to be long-winded (sorry in advance) but I NEED ADVICE!! My in-laws cannot decide on anything. I’m so stressed. They are gracious enough to be the amazing people they are by paying for everything (two weddings) because they understand that my fiancé and I are a young couple and my mom is a single mom who is struggling herself. But lately, things are not working out! We can’t find a venue, if it isn’t one thing, it’s something else. We found one but it’s slightly underwhelming- which can be fixed with decor but now we’re in a mess of trying to find something to suit the taste of my in-laws. It’s a fiasco trying to agree on anything. Once we do, it’s like it’s forgotten about and we’re back to square one.
I’m so scared we won’t have anything and it’ll be a disaster. I want the best, so do they, but we’re a little late in planning and most venues are already booked or won’t allow us to have outside catering which is essential for us (Authentic Indian food). We take one step forward then two steps back and everyone is extremely stressed about this wedding. What can I do to help us all come to a decision? We have nothing booked because of this issue and I’m so scared of running out of time!!