Hey man I'm only 20 and I started working on my car when I was 18! I've done loads of stuff to this car and I learned all thanks to the internet and my own trial and error. I've definitely made my share of mistakes too but thankfully most have been reversible. Just remember, measure twice, no, measure 4 times, drill once. Remember that if you drill holes in the metal of your car, there's no going back unless you buy the entire part over again. My recommendation is that if you drill the holes, paint the holes with some sort of metal paint so that they don't ever rust. Be sure you wait for the paint to fully dry before installing the spoiler. Also, be sure the spoiler comes with good adhesive. If it doesn't, buy some good 3m tape. The stuff is incredible. What "universal TRD spoiler" are you talking about? sounds a little sketchy to me tbh.