In this and most cases yes. One exception is numbers, they should not be quoted, e.g. below: 30 If you quote a number it becomes a string.
The UI is an introduction to automation. It can do a lot but not everything. For advanced automation you will need to learn YAML and a bit of Jinja. Like most things it will become second nature if you practice at it. There are plenty of examples in the docs and people here are always willing to help.
Or perhaps you might like NodeRed. I’m not a fan but plenty of people prefer it.