For Worgen, the Dirge of Teldrassil is open to nelves/worgen and is in the midst of a series of events. They’re more of a rag-tag partisan group, so is semi-military themed.
For blood elves, there’s the Highblood Myrmidons who recruit belves/nightborne on the Horde side of things. They’re more military themed, and lean towards elf supremacy.
Both are newbie friendly, and I’m sure won’t have any problems if you’re a bit rusty.