Always stay in the middle of the lane (unless you need to avoid a pothole), never overtake unless a car would have space to overtake, never enter an intersection alongside a car in the same lane.
On a bike, you also have the option of behaving like a pedestrian (cycle on the sidewalk slowly) occasionally.
If you don't do this, it's only a matter of time before a car hits you because it didn't expect a vehicle or pedestrian doing what you are doing.
This is wrong. Use the whole lane to be in the best spot to see and be seen. Use lateral movement to increase your visibility in driver mirrors.
I have an old Gibson Marauder that rapidly gets out of tune. So far no shop has been able to do anything about that. It would probably go for $400 or more retail, to a beginner who doesn't notice (or thinks the problem is his/her fault). But it's no fun to play. Chords sound bad. And that kind of thing is not unusual.
If you really want to play you will play regardless of the instrument you have. Like many, I started with cheap instruments, so I figured out how to fix them or at least make them better. I was 12 and wanted to play guitar, my parents were not willing to spend money on it and just found some handme downs from the relatives, and I made it work because I wanted to play guitar. Ended up teaching myself lutherie, made some money, made some instruments. These days it is easier than ever to maintain your own instrument with the internet to answer all your questions, I had to learn to repair and maintain my guitar by working backwards from books on construction since that is all my library had.
>So far no shop has been able to do anything about that.
It is an issue with the bridge, the nut, and or the tuners, on a guitar of that age it is a fair chance it is a combination of all three. I am guessing you are bringing the instrument to normal guitar shops that primarily do sales and lack anyone even remotely competent when it comes to repair.
[0]https://www.guitarcenter.com/Gretsch-Guitars/G5210-P90-Elect...
If you want to make "experimental" music then ... you'll have to experiment. Most of the recommendations in these comments are aimed at experimental music.
Most things labeled "computer music" belong to a very specific retro experimental music aesthetic, literally dating back to the era when you could barely make music on a computer at all. Much of this music was heavily influenced by academic workers. That may be exactly what you're looking for! On the other hand if you're not quite sure what I'm talking about, then be aware that "computer music" is not the only, or even the sanest, way to make music on your computer.