Cong0110 - firstly, congratulations on your manifestation!
Yes, you are able to cope now. And now. And now. (And endless "Nows" from now
). How do I know this? Well, who ever hired you identified the fact that you have the skills needed for this position, as well as the potential to learn any new skills required as you go along. Acquiring skills and knowledge is easy if you have a positive attitude towards your job and towards learning, and as you've demonstrated that you can manifest a great job, you already seem to have a great attitude.
If doubts creep in, use the techniques of affirmations to refocus your mind: "I am easily able to cope", "I learn new skills easily", "I am capable" etc.
And above all, enjoy!