Being interested is not always suitable. Sometimes, you may want to do something, have an interest in it, but when you actually try it, you realize it’s not that fit. It's like picking unripe fruit, of course it won't be sweet, and you can't fully utilize your strengths. It's essential to try various things, learn to give up, and choose again. Try to find the right direction instead of pushing hard in a field that doesn't suit you. Often, the reason for giving up is “have no choice but have to”, once you've let go, there's the possibility of trying another direction.
Insist on doing something, but you need to adjust your methods. The surrounding environment and the market are constantly changing. In order to survive, you must adapt yourself to meet the market's demands. Persistence doesn't mean persisting in doing something that doesn't work, it means persistently finding new methods and channels to achieve your goals.