well.. i am going to post my questions here than.. maybe i get some replies 
what i got so far:
- installed LibreELEC (official) v7.0.2 (Architecture Generic.x86_64)..and it's running
- from the libreelec repository i installed the following addons.. and they are reacheable over the browser
-- HTS Tvheadend 4.1.1945 - LibreELEC Tvh-addon v7.0.102
-- OScam 11233 - LibreELEC OScam addon v.7.0.1.1
- tvheadend did find all services.. incl encrypted channels (UPC ZH)
..and this is it so far
problem 1: oscam and osemu..or whatever i need
what is the exact procedure so i can "pimp" my oscam, so i can descrable the encrypted channels?
(i have no experience in any linux environment.. and even less with ssh in libreelec)
problem 2: connect tvheadend to the emulated cam
what would i need exactly to do and configure after problem 1 is solved?