I'm not putting you down for your age here, but it's a simple reality, there are very, very few 14-year-olds who I think would be ready for, or benefit from acid. I strongly recommend you wait at least a couple of years.
That said, it's good that you're at least looking to a harm reduction site before you drop tabs, that's smart, but the smarter thing is to just not do it. If you can find someone willing to sell you acid, chances are it won't actually be acid, or it will be badly cut, and then you're potentially in deep shit.
As others say, marijuana can cause brain damage at your age, so you're also better off putting that off for a while, especially with your music career in mind. Using drugs to enhance creativity is cool, but it has to be done wisely. I know this is annoying, and sorry if this is lecturing, but please think very carefully about whether this is what you really want, right now, or if it can honestly wait. If you're using LSD to find your place in the world, or understand yourself, or figure out a way past depression, it can help with all that, or it could seriously confuse you and make things much worse. Adolescence is naturally turbulent and in almost all cases, it's better to wait until you have some grounding and stability.
All that said, well done for seeing past society's anti-drug propaganda. And it's great that you and your friends don't have a dicksizing approach to taking substances, but rather a genuine drive to learn something from it.
Now, about these trips. First,
Please dont put me off for asking about taking LSD, I feel ready for it, im ready for a bad trip(if im unlucky)
NO ONE is ready for a bad trip. I've had two. The last one traumatised me for at least a week. And I'm lucky. I know people who've ended up in mental wards from bad trips for months. Some don't recover at all. A bad trip may sound like some scary experience that you can just get over but really, it's more like being trapped in a coffin underground for twelve hours. Your own brain can turn relentlessly against you and it can be mentally scarring. I say this so you don't go in thinking, "I'll just take five tabs, worst that can happen is a bad trip, so what?"
>>>>>How do I avoid said bad trips
Others have said it, but set and setting. Start low, like you're planning, so you can get a firm grip on how the substance works. Do it with friends you trust, in a safe environment, in a good mood, with no concerns plaguing your mind. Do lots of research on bad trips and how to avoid them.
>>>>>What should I do whilst tripping?Listen to music, lay down, watch TV?
I'd recommend all those things, except TV. Wherever you are, make sure no one's going to potentially interrupt you, especially parents, because that can be a huge source of anxiety / trip disaster material when you're high. Consider doing it out in nature, on a bushwalk or something, if you can.
Good luck with whatever you decide.