I need website optimised for mobile viewing

I have made a Wix website which looks good on a desktop, but it needs optimising for viewing on a mobile device (which is how 90% of people do it these days). All of the elements are there, I just need help with the final touches. It is live, but it can be adjusted and re-published.
Some of the elements get out of order when viewed on a mobile as well, which is obviously not ideal.
Ideally I need this done as soon as possible.