I want to design surveys on my local computer using LimeSurvey and upload these to my LimeSurvey Cloud instance later. Is that possible?
Yes. Generally, that is possible without any problems. There is one important thing though: You can't import files from a version newer than the version LimeSurvey is using, but usually, LimeSurvey Cloud always offers the latest stable version. Currently, you can import surveys from any LimeSurvey version 2.6+ or newer. Note that you can download any past LimeSurvey version from the LimeSurvey download area.