please share knowledge with new nurse

Hello,
I am a new nurse.I am being offered a case as a clinical trial nurse.I am very excited, I have done reshearch trials before and I love the whole feild.I am very comfortable drawing blood venously but I will be working with SN infusions and drwing blood from portacaths.I only did this once with my instructer in my clinicals. Will anyone share their knowlegde of the correct procedures and safetly precausions ect. on SN infusions and drawing blood from portacaths.
Thank you very much ,
Angela