Check Facebook for groups to join. I'm in one called IB DP English Language B teachers, I'm sure there will be others for other languages. Lots of sharing of resources and ideas, including people's made-up exam papers to use until there is more stock of actual papers in future.
Agree with PP re an official IB training course, though if you're new to IB I would recommend getting a few months in and then looking for Cat 2 courses once you have your head around the system. Cat 1 courses are just introductory, you will learn more on a Cat 2. Your school should be ensuring staff are IB trained if they want to keep their IB accreditation, regardless of the cost.
Ask your school for membership of InThinking. I don't know the cost but I was thrown into the deep end teaching Lang B this year and it was the most helpful thing for me.
The course is based around 5 themes so use that as the basis for your scheme of work. People either take one theme each in turn (though there is loads of overlap) or they cycle through the themes repeatedly so they are all covered over and over again (my preference).
Contact other IB schools in your area and ask to meet with relevant teachers. IB teachers tend to be quite a collegiate bunch and should be happy to share ideas and maybe even whole schemes of work.if that doesn't work, try schools elsewhere (even abroad).
There is now an IB thread on TES, brand new so not much activity yet but worth a look.
Good luck!! IB is a great system but it is very different from A level and will take a while to get used to. It will look great on your CV having both A level and IB.