If you are able to write script, you can be an engineer.
You may not be the top one, but you are very likely to have a better income.
Try one or two basic coding classes, and see how it goes.

「我很怕花了錢又找不到工作」well... no pay no gain; it's just 1 or 2 classes, try it out; after all, it's not like you're pursuing a degree which for sure costs more....