This page is packed full of resources to help you, and links to products or services we have used (with success!).
See https://improvephotography.com/ for fantastic tips on taking photographs. Note, the author is one of the top 10 most highly rated photographers in the world.
Property Channel Manager
I highly recommend Sirvoy.com. They provide excellent access to all booking channels (OTAs) and they have a 15-day free trial.
I have tried 3 different channel managers and have found these to be the best by a long way.