I picked this up with no expansions or DLC. The first video on it I watched said follow a build guide. The only places I found build guides weren't all that informative. They weren't broken down just a list that went on and on of builds. Any ideas or suggestions for a new player oriented build?
Hard to find info for the older expansion stuff tbh. The generally good starting builds are vitality caster, tanky melee and summoner. However expansions, it's hard to make a good tanky melee I think(the basic ones are death knight which is necro/soldier or warlord which is oathkeeper/soldier). Vit caster also usually is ritualist recommended(necro/occultist) but you can do cabalist(occultist/shaman) and work out ok, although you can't get the good set for it so I don't know. Summoner works fine but again you're forced into cabalist for that since no necro which isn't bad, cabalist is one of the more powerful variant and the necro variants generally require sets to work well.
You can do other builds too but they might require more luck on drops. For example Blademaster(soldier/nightshade) dual wield melee is great eventually, but it's fairly gear dependant. There's an easier version that is Infiltrator, but that uses Inquisitor which is again, an AoM class.
It's a bit weird because many builds use necro, inquisitor or oathkeeper as a secondary, probably because these classes were made later and are more complete in what they offer, so they fit many different builds and give you many options for them.
Still you can probably play whatever you feel like and be fine to clear the game and what not and start farming. I know warder(soldier/shaman) should still work fine with primal strike, blademaster should be ok if you farm the reputation weapons, fire caster with demo+arcanist should also be good.
Better question is what kind of char do you want to play, and then it'll be easier to find a build that fits that. That said, it might also be a good idea to grab AoM since it's on sale I think, the 2 classes they added complete many builds and they offer 2 farmable legendary sets, most items are purely RNG drops in this, but these are deterministic, the pieces drop from specific mobs so they can be target farmed in 4-5hours and give you a very solid starting point. But you don't really have to, if you just want to fuck around with the game first, you can just pick whatever feels interesting and not follow a build.
Only main advice is dump most of your stat points into Physique, only take the others as needed to equip gear(I like floating 10 or so points to dump into a stat if needed), and max your main skill early to make it easier to lvl, while putting 1pt into various stuff you want. Also max resists, as per usual in ARPGs, by the time you hit elite, you should look into using components on your gear for resists and augments from reputation to fix most resists.
And since the game isn't always online stuff, you can always just whip out the save editing to fix any problem you had when you made your character.
Mostly checking a guide will be good to figure out a basic devotion path, since this shit's is fairly complicated, kinda like PoE skill tree, but more confusing.