It’s very tempting to postpone this as must as possible but you should be talking to your potential customers.
… otherwise most of the features you’re about to build will not be used … unless you (or somebody on your team) know the market and its problems really really well.
People are afraid of being criticized and that’s the one of the main reasons for people to build in isolation.
They may say that their product is not good enough so it should not be shown to potential customers. You are afraid of rejection which can have many forms.
Remember you are not your product!
If you want to be successful you will need to embrace the build in public (#buildinpublic) approach.
That way you share your daily progress and people start to know you and will share some valuable feedback and will help you learn and advance quicker.
The thing is you can’t escape reality for a long period of time. Soon or later you will have to face it. The sooner you face it the better you’ll be able to do something about it and adapt. You can turn almost any situation into something that can benefit you or your product but you have to come up with ideas and try them.
How would you build a great feature if you don’t know the real pain points of a customer?
It’s like shooting in the dark. You can hit something but it would be mostly luck rather than skill. It won’t be repeatable.