Tape recoding: split, numbering and export into single files

I’ve installed Audacity 4. Managed to record a tape. Manually cut/split it between tracks. Now I am completely stuck. Can’t get my head around it.

1-How can this be done automatically?

2- Then all the tracks are called audio 1#1. How let Audacity4 automatically give each track its ascending number?
3- Next how export all single tracks instead of 1 big linear file?

Read Audacity ® Manual | Split but It’s all very complicated indeed.