Re-do your clone, clear the suggested layout in the bottom (target) box and drag down the partitions from the source drive - you should be able to drag the right edge of tha last partition in the target bi’s to use all the free space.

I’m not in front of my machine at the minute but I’ve done this loads of times and that’s about the gist of it 👍

Pleeeease don’t open an FTP server to the outside world - the potential of you landing in a world of shit is just too high.

Swap your learning project to running a vpn endpoint instead, you’ll understand more the reasons why as you go through the work. 😊