Hi there, Keith, welcome to bluelight. Unfortunately this kind of topic is not suited for other drugs. Basic dosage/effects questions belong over in Basic Drug Discussion. Since you said you did your research, i am not clear as to what your question is.. If you want to know if it is safe to do heroin and then drive around listening to music, the answer is NO. If you are not familiar with the effects, driving on heroin is not a good idea. If you get too high, your ability to drive and focus will be severely impaired. You don't want to nod out and cause an accident, do you? Not only for your sake, but for other drivers/pedestrians as well. If you have not done heroin before, make sure you think long and hard wether or not you want to go down that road..
Have you done other opiates before? Or just plan on trying heroin randomly out of the blue.. If you do not have any experience/tolerance to other weaker opiates, jumping to heroin right off the bat isnt the smartest idea. It's kinda like jumping into the deep end before you even learn to swim.
That being said, since it is your first time it is smart to start very very small to gauge the dosage and get a feel for it. Snort match head sized bumps every 20-30 minutes until you get where you want to be. It is a plus if you know and trust your source. Also, having someone experienced with you during the experience is a very good idea, incase anything were to happen, and also to walk you thru the experience.
I am going to close this since this isn't an Other Drugs topic. If you have questions about the basics of heroin please post in Basic Drug Discussion. Also take amoment to read over the BLUA and other drugs guidelines/posting standards, located in my signature. If you have any questions about the rules don't hesitate to private message myself or any other staff.
welcome to bluelight, and best of luck to you.
Mike