The project looks neat and definitely does way more than quite a few services in the same category.
Here's some feedback:
1) The video isn't visible on mobile (at least in Chrome). Also, add more screenshots/videos to get a better idea of what it looks like. Move Privacy and T&C sections from top menu to the footer.
2) Your website doesn't show what the software does apart from the video and some descriptions. A lot of companies do the mistake by listing all the features their product can do, instead of listing solutions your software is solving. Generating quotes and proposals is the ultimate PITA in every single company and experienced by every single sales rep, so they'll relate pretty well to things like ' can create initial quote 70% faster compared to other methods', etc.
3) If you struggle to come up with new ideas/evaluate existing features, look into CPQ software, some solutions have demo versions, so you could play around with it. No matter what kind of feature you'll come up with, there's a good chance some of them already implemented it.
4) If you don't know where to look/how to hire sales people, or which type is needed at this stage- get ready for a rough ride, it's a bit wild out there.
5) Start thinking of the ways your product can be integrated with CRM systems(e.g. Salesforce). There's even more money in there + lots of sales teams already use CRM systems one way or another, so some integrations would be easier to sell.
6) Your revenue is too low right now to be able to hire sales/marketing people without pouring in additional capital, so here's what you can do:
a) start selling it yourself. Even though for both of you it's part time gig on top of the main jobs, diving into the sales side will be fascinating and eye opening. It doesn't need to be very hard. You are selling to sales directors/heads of sales/etc. Go on LinkedIn, search for those kind of roles and start contacting ( even if it's 1-5/day). This way you'll get an idea of what's missing and how it works and what kind of people you need to hire.
b) do some content marketing. Case studies are amazing. Speak to your existing clients, ask if they'd like to help you out and write how your product is helping them.
c) If you want to hire sales reps without huge upfront costs, look into the sites, where you can get people working on commission only. I don't remember any off top of my head but google would probably give some suggestions.
For those who are less familiar with this software sector: there's tons of money in this. There are quite a few large market players going all in on this. There's lots of market consolidation happening too in recent years. Having said this, there's still a lot of space for smaller products, like this one, as there's tons of companies that don't require all the bells and whistles of enterprise level quoting tool.