Yuflyma Instructions?

I received my jabs in the post a week ago but I am still waiting on an appt to go through instructions on how to administer them (the boxes say 1 jab every 2 weeks)

Would it be ok to just crack on with the first jab? Is it a case of just sterilising the area and jabbing it in?

I'm keen to just get on with it and test whether this stuff is actually going to help me at all