Welcome to the site, Darrix
So many novels are dialogue-driven nowadays and mine certainly fall into that category - you might find once you get started, that the shift isn't as daunting as you expected.
The best way forward is to join one of groups and upload your work for some constructive criticism - and you will learn a lot from critting other work as well.
And don't be afraid - we're all apprehensive at first.
Good luck with it