Go to Any Local Store and Buy an OTG Adapter (a Converter from Micro-USB or USB Type C(Check your Phone Port) to a USB Type A)
and Get a USB Hub (a Converter from 1 USB Type A to 2,3 or 4 USB Type A)
Connect The OTG to Your Phone and The USB Hub to Your OTG Then Connect Your Keyboard and Mouse to The USB Hub
After You Finish Connecting Everything Go to Vectras VM and Enter The Rom You Like The Keyboard Will Work Automatically
But The Mouse Will Not so You Have to Go to on the Top Notch
Then Mouse Settings and Choose "Bluetooth/USB Mouse Option" and Then Close the Menu
Then the Mouse will Work Just Fine
If You Want to Hide the Controlles You Can Press on the Back Button on The Dpad Option and Choose Mode