next week I am joining a new project. I will work with webservices integration. I have worked with that but I have no a lot of experience in it. I donĀ“t know if I should hit the ground running
Work on some tutorials and learn some of the key concepts relating to web services. There are plenty on the net, and I also have blogged about the core concepts.
I would suggest you to ask your module lead (or, immidiate senior to whom you will be reporting) what kind of web service you will be working around before starting straight away. The concepts of a RESTful service is totally different (except the fact that both of them are web services) from a SOAP based service.
For a RESTful service, check the below wiki link to get started; its a superb one