I've updated your thread title just to make it a little clearer what it's about.
You can always try each of the trucks and see which one you prefer! There's usually plenty of engine mods around too if the one you like doesn't have the power you want.
Personally, would stick the W9 anyway most...
There’s likely more than one issue here, but I would start by taking out all the Scania mods you’re using as there definitely seems to be an error with that looking at your log
00:05:06.724 : <ERROR> [fs] Failed to open file '/def/vehicle/truck/scania.s_2016/accessory/equipments/stock.sii' in...
I can't tell what you're extracting, all you should need to do is drag 'PH6 Krone Skinpack.zip' and place it in your ETS2 mods folder.
Is that what you're doing already? If it is, try just using windows explorer.
I've moved this over to a thread instead now @Ecronbuses :)
If you're looking for 'essential' mods, as long as you've got the necessary DLC I would recommend the ProMods map as it adds way more new places to explore!
Also, try to play the initial story line of working for an agency, saving...