Very welcome!
As for the army list itself, looks straight-forward to me! Two nice big blocks of capable infantry, three harassing Hobgoblin units, a Monster-Sorc, two war machines, an Iron Daemon and a few Bull Centaurs ticks all the boxes. Personally I’d be a tad worried about the lack of protection on the Sorc especially, but I’m anyway someone who is prone to max out on magic items.
Still, there are some very potent magic items which you could check out for the Sorc (I’d at least go for a ward save tbh) and the Black Orc Warboss (e.g. Trollhide Trousers and a few magic weapons). Also you could consider putting Hellbound on the Iron Daemon, that works quite well with it.
Lots of additional information can be found in the Big Chaos Dwarf Tactics Compendium