Have you not tried the Ubuntu Support forums ??
They do have a ‘Absolute Beginners’ section, which you can post any question, but I would recommend searching beforehand as the same questions get asked over and over and over again lol .
Their a friendly lot and someone will help you out.
Good luck and nice to hear your trying it out … it’s a bit of a steep learning curve at 1st if your only used to a Windows environment.