| Diabetes takes some adjustment but it shouldn't effect your ability to do your job. Maybe you'll need to take breaks or lunch when your body needs to instead of when work needs to but your employer will also adjust to that. If you are in the US employers are required to make reasonable accomodations for people with disablities (no diabetes doesn't mean you are disabled but it is covered under the Americans with Disablities Act). As you learn more about diabetes you'll become more comfortable with it and it won't be so scary.
Complications can be avoided with good control. Read as much about Diabetes as you can before you go to the doctor so you you aren't intimidated by the information he is going to throw at you and you'll be able to better ask questions. As you read/learn about diabetes before you go to your appointment write down any questions you have and take your list to the doctor. Its easier to remember them if they are written down and if you are too afraid to ask them you can just hand over the paper to the doctor.
Ask questions here too. there are many people on the forum willing to answer questions. You'll get some good advice. | 
