I need my website, booking software and social media accounts to talk to each other

I run a business in Vanuatu called Tropic Thunder Jet. It is a jet boating business on the stunning harbour of Port Vila. We provide thrilling rides for people on holiday. I need to target the Pacific Cruise ship markets - Mostly travelers from Australia and New Zealand
I need my Website looked over and for keywords and SEO applied. I built it myself from WordPress with little knowledge of these things.
I have a booking software program called www.rezdy.com and it links into my website and Facebook page. I want to drive traffic to this so as I get more online bookings. I need the Facebook pixel added to my website
I also need some great adverts that I can place on social media.
The booking software has different options to upgrade and I may have to do this do benefit more. But I may just need the right online adjustments made first.
I also use Xero Accounting system which can be integrated into Rezdy if I upgrade. This may be beneficial if the bookings increase dramatically.
I have a YouTube page with 2 videos
www.tropicthunderjet.com
www.rezdy.com
www.xero.com
So essentially I think I have most things but its all broken and they are not talking to each other and working together.
I hope someone can help me with this.