Here are two guides I made for beginner player that will fit your needs
Forcewave is similar to Hammer of the ancients and seismic slam for the Diablo 3 Barbarian.
¤¤¤ Forcewave Spammer Warlord ¤¤¤
¤¤¤ Forcewave Spammer Death Knight ¤¤¤
very similar, the main difference is basically what kind of other builds one can do later one when you have found more/better gear.The guides are very detailed and will show you how to make a good starter farmer char without having these dope items that other people might suggest.
Anyway, I suggest you have a look at the list of the end-game build proposals (basically a compilation of builds made by people on this forum) to see what class would suit you best in the long run.
If you wanna continue with the forcewave skill, I think Warlord is the best of these two.
Also, the warlord has a whirlwind-like skill called “eye of reckoning”.
For abbreviations and in-game terms, this is a good source: GD Acronym and Abbreviation List