What are you allowed to do with a doctors orders

Staring Iv's order required

administer medication yes--doctor writes the med order and when/how often it is to be given..must have an order to give a med

IM and SubQ injections the doc specified a route in the med order (i.e. PO, subQ, IM, IV, PR, etc.)

dressing wound yes, although I worked on a unit where doctors would write "chest tube dressing changes per protocol (protocol on this unit was q12 hours and as needed)

Vital Signs ​This is per unit protocol, although the doc can always specify more (or less) often that the unit's protocol

catheter insertion order required

blood transfusion order required

Inserting a nasogastric tube order required

I think that your question has been fully answered one of your other threads:

https://allnurses.com/pre-nursing-student/what-tasks-nurses-841358.html

(What are tasks that nurses can do with or without a doctor's order?)

Homework again? ::sigh:: We already answered your homework question on that other thread.

Listen up. We don't take "orders." We are not in the military. Well, most of us here, anyway. :)

By law nurses implement some parts of the medical plans of care as prescribed by a physician or NP-- not all parts, which are implemented by other disciplines, like therapy, lab, dietary, radiology, etc. Nurses also have a great deal of responsibility and autonomy to assess, prescribe, and delegate/implement actions in the nursing plans of care which are not part of the physician plan of care and not prescribed by physicians. I wish more people would get their heads wrapped around this concept.

OP, I do think that your many (I count 9) threads have given you a wide variety of advice and opinions about the career of nursing (sometimes in duplicate or triplicate). I think that you have likely had the best responses that an online forum can give.

Your next step would logically be to visit an actual nursing school and investigate your options and ask your questions for specific-for-you answers.