Total noob in OT. how sampling in real time?

Hi all, sorry for disturb , im happy with the OT (not so happy because is very hard to take over the control these first days hehe) but im sure it will be very very happy few weeks later …
im new and i suppose some of my questions could be solved in this forum before, so sorry .
I have readed the manual but i have difficulties to understand it.

I have learned how to do the “manual sampling”. Finally it cost me like 3 hours for learning . Yes im really stupid but finally i got it.

But now my questions are :
can somebody describe me step by step ( imagine that you are exaplaining that to your grandmother) how to real time sampling what i hear from inputs please ? :

example : i have a synth sounding from OT inputs AB , how can i record in real time (NO EDITION MODE) and save the audio in the own track (for example track 4) and in the sequencer directly in real time ? ( like a looper) which steps must i follow to do that please ?

I have done this but can´t hear nothing . Something is missing.

And my second sampling question is : can somebody show me step by step how to record in a track (for example track 4) what i hear in the rest of the tracks?

for example : track 1, 2 and 3 are sounding and i want to record all these sounds in real time in the track number 4.

Thanks very much , this will be amazing if somebody can help me.

Greetings from Spain and sorry for my english.