@AppLee LibreOffice is not needed but some packages in terminal, indeed.
Technically I was using any devices as a computer if it had terminal even without root.
Found this old S3 Neo in a storage I left long ago, technically more can be done via Termux or any simulated VM on Android because free space in root is not 2GB with free 76 MB.
From this point lots of unanswered questions my Android phone (not this one) is more usable for daily usage or a game play like with this device just because interface is more better for eyes because of daily Ubuntu usage on computers.
Still thank you, for your answer.