how do I get the online keyboard in Windows 10

I am using a cheap tablet that came with Windows 10 installed. i have downloaded Libre Office 5.3 and installed it as I would on my desktop but can not use it normally because the onscreen keyboard does not appear when I click or double click on the writing cursor.What can I do?
I can use Windows 10 Ease of access but it is not very user friendly and disappears if you use the minimise icon .

The question everything but irrelevant!