Dude,
Like the crock hunter stated “Don’t muck with it ". Rattlers can easily come back on their own bodies and tag you. If you try to hold the head, and do it wrong? You get a fang in the finger and end up on Venom ER, The NBC4 news, and if lucky the kingsnake.com news section.
I understand the fascination with aggressive snakes, as so does everyone else who hangs out in this form, but common brother. You are 14! You have many years ahead of you to gain experience, patience, and maturity. Start out with the mean snakes that most likely won’t kill you and will only hurt when they bite. Try a Carpet python, Scrub Python, or even a mangrove snake. All have great attitudes and usually love to bite (ouch).
On the real, I would hate to read or hear about you down the road as another snake bite statistic. I have worked with many rattlesnakes that are sneaky. They will act mellow and non agitated, but as soon as you touch them bare handed, WAMMO they tagged you.
This is my two cents.
Good luck
Jason