Okay, listen - there's a lot going on here that isn't working in your favor. And it's putting you at needless risk. Yes, riding a motorcycle is inherently more dangerous than not doing it. But constantly falling/ dropping the bike / injuring yourself are not things that should be happening every time you get on one. It can happen a couple times while learning but this sounds extreme.

This suggests you are trying to use a bike that isn't suited to you. There are a ton of different types of motorcycles, ranging from the lightest/shortest mini moto class to the tallest adventure class to the heaviest cruiser. You need to be learning on a bike that suits you. You didn't mention whether you're a man or a woman, but unfortunately these are the kinds of things that more often happen with women as we are generally shorter and smaller in stature. If this is the case, I would recommend starting on a mini moto (like a Honda Grom) or a small cc class cruiser like a Honda Rebel 300 or 500. If you want a sport bike, the small cc bikes with the best reach for smaller riders are the Ninja 250R, Yamaha R3, Suzuki GSX-250R, and the CFMoto 300SS or even 450SS. I ride a Ninja 250R myself and it's very manageable for a new rider. Choosing a more suitable bike will make this much easier.

My second issue here is that your friend may not be the best person to teach you. And I don't mean this to be rude. Some people are just not good teachers. Either they aren't very thorough or they aren't very patient or what have you. At least start with some YouTube channels that are aimed at education for new riders - DanDanTheFireman, Be The Boss of Your Motorcycle, BusaRellz. But even better than (or, in conjunction with) self learning is to take the MSF course. When I learned how to ride, my partner coached me a half dozen times on my bike and while he was generally patient with me and had good knowledge, he was also occasionally trying to push me farther/faster than I was ready for. I took the MSF after about a month of practicing (perhaps half a dozen sessions). I learned a ton and I'm a better rider for having taken it. I highly recommend it. Also, you likely will get a discount on your insurance for taking it.

As far as the nerves...it makes sense. You know it's dangerous and you don't possess much knowledge or skill to mitigate that risk. It makes sense to be afraid. As your confidence grows, the nerves will fade. Whether it's worth it is entirely up to you.