Using mid 2017 Macbook Pro and experiencing issues with sound and system shutdown

Hello there, I am very new to Linux and after few weeks of ignoring the problem, that 1. sometimes my sound works sometimes it does not and 2. sometimes it shuts down properly, sometimes I turn it off manually by pressing power button, I wanted to just get it done. A range of sources provide different solutions, but nothing seems to work for my computer.

1)
In Settings/Sound it is obvious that sound is detected, however it is not played through the internal speakers. I do not own particular headphones, so I can not tell if it is played through different outputs. In last weeks when it did not work, I had to turn off/on the system for a few times, sometimes rebbot it in terminal.

I do not see any Dummy Output in the Sound Settings as some web sources suggest. Output device is shown as "Speakers - Build-in Audio"

I went throug different aprroaches to this issue, installed/updated/upgraded literally everything what I though that can help, but I still can not hear a word.

2)
As I said. Sometimes it shuts down/restart properly, sometimes does not.

Feel free to ask me for further details, I really do not know what data about the system are needed to troubleshoot, and solve the problem, at this stage

Thank you!
Rob

Terminal output from Step3: http://alsa-project.org/db/?f=faf99756c36bf7649f29c4fb4ae0e4e9496a16a1