Dear Michellebella
So sorry you are going through this, many of us know how you feel - it's such a shock, things move so fast, it's bewildering and frightening. You sound as if you haven't much support so that's the first thing to try and improve. Can you get in touch with a breast care nurse? Is there anyone who can come to consultations with you? It's hard to keep track of so much information or check options by yourself.
I know it's hard but if you can, try and concentrate on a few days ahead, not weeks or months. One step at a time. Time to worry about radiation after you gave got some handle on chemo. Chemo nurses are experienced, they'll find a vein. Get some help to sleep if necessary, you have a bit of a road ahead and you need to use your energy and strength for positive things.
There are are many of us who have been through this, it's do-able! Starting treatment is a really good start. Take care and best wishes.