Thank you very much for your help and reply!
One last thing please (because i have read it above):
If my computer will be damaged or i want log in from somewhere else:
Then my username and password will also be enough if i enter my wallet over the cloud wallet?
Because normally you have a 12 word pass phrase or something.. But here username and password will be enough? Also from another device?
Yes. With a "cloud" wallet your username and password will work from any device.
Thank you very much for your help!