The Elder Scrolls Online

its 1500 crowns per month

Base game is Tamriel Unlimited, there's some forms of trial but not too sure to what extent.

Then complete collection has various DLCs packed with it. Those aren't full expansions, they're like major patches content kinda(the actual patch balance and what not is applied to the game obviously, just you have questlines with unique items/crafting stuff in those DLCs). Note that you get access to all of them as long as you have the premium sub active. You can also buy them with crowns individually if you want to, but it seems like if you don't mind paying the sub, it's pointless to bother with this edition as you can just do them for free. Buying a sub also gives you crowns, so eventually if you're subbed you can just buy them, plus the sub gives useful stuff like unlimited bags for crafting materials.

Then you have the 2 main expansions, Morrowind and Summerset.

Both come with a standard edition and an "upgrade" edition. The standard comes bundled with the base game, the upgrade is if you have the base game already and costs 10$ less(so the base game is more or less valued at 10bucks or less, buying it for more is a ripoff). Sadly you missed the good offer with Summerset release where Morrowind was included for free with any preorder of Summerset. These have substantial content(Morrowind has a class too while Summerset has jewelcrafting/jewels) and aren't unlocked by having a sub.

I grabbed Summerset with Morrowind bundled for 25bucks a few weeks ago since it was a pretty good deal, but now getting everything will run you quite a bit more money. Have yet to play it though and probably won't for a while, just I figured the time it will take for Summerset to drop in value where I could buy everything at the same price was going to be not worth waiting even if I don't play now.

I'm 15. Been pretty fun but it's hard not to get into the 'am i making my build right' stuff and not just play the game. I tried to pick up a bow and start leveling that and felt useless for a whole dungeon, now that I can swap weapons I feel like I'd never try and do that again.

What's the quickest way to get that polar bear mount, or are those tier of mounts just the obvious 'oh look, he's spent a bunch of $$ on the game' items?

I gotta try some of those mods.

Is the Twitch client not an efficient way to manage these, I see it's missing most of the list above?