I have opened my account about one year ago. I was absent for a few months. But now I want to start work again. Is it good to open a new account for me rather than work with the old one? Please suggest me what should I do now?
It is best to keep your old account. You will appear to be a more experienced seller.
In addition to what @vickiespencer advised you could mention this in your profile description.
You can create new gigs and update the old ones.