The full width image is totally fine, but it should complete the message. With a landing page everything should be clear at a glance and there should be a clear call to action for the user.
I think in this landing page there are some things that you should consider, so apologize if my answer will be a little bit out of topic, but I think those are the important things:
What I see here is a welcoming message, not a call to action message, and it's not really clear that you can actually click in order to scroll, moreover, it's not clear what to expect next.
In my opinion the message should be clarified. Write a better copy which speaks to the user, put some information about what the user needs to know, but keep it simple.
Is the page describing clearly and in an understandable way what you are offering to your target?
Also, think about the first question that could came in your user's mind, is there the answer at first glance?
Last but not the least, the button on the right corner looks like a kind of call to action button, because, even if it's a ghost button, it is a primary button in your system, but it's just a 'getting touch', so it's not totally clear which is the primary call to action for the user. Regarding what I see here there is a 1:5 attention ratio, while ideally it should be 1:1 (based on the number of interacting fields), to optimize the landing page's conversion.
Hope it will be helpful!