I've never actually tested the soft lock. I've just assumed it was there. It would be funny if Link walked outside the temple, took one look around and nope'd back to childhood.
Stone Circles, spoilered but I don't know when or how you would ever know this. It might be some sign or dialog I've skipped over for several playthroughs...
Try the Song of Storms, or the Megaton Hammer (when you get it)
If those don't work, I try Zelda's lullaby, Song of Time, or the Scarecrow song, or the eye that can see the truth.
most of the time I just give up lmao
commentary
I've finally decided to switch to English for the remainder of the playthrough. I know this isn't exactly highbrow literature, but I still want to make sure I'm not missing any important story beats or lore dumps. ... I was pretty shocked by just how grim things were
I would put Zelda's writing in the Young Adult category; enough moral distinction for a proper Hero journey, while still letting some dark to seep in around the edges. In fact one later dungeon kinda depends on a little dark lore. If anything, Sheik loves the poetic so I imagine that Japanese would be hard to translate. I can see playing a second time, lore firmly in hand, would make a Japanese run easier since you would know the gist.
There is a way to fix your sword, but I'll let you find that one out on your own 
Hell yeah Epona! Combined with the size of Hyrule Field, riding around with her felt like the world was big in a way previous games couldn't capture. Also Hyrule Field is big and sometimes pretty tedious to cross without her. Win some lose some amirite? Horses are my favorite feature in all the Zelda games.
The Lost Woods is definitely tricky, but it will become second-hand in no time. Also Skull Kids don't like adults, as one Kokiri will tell you. And yes sometimes the beanstalks don't go anywhere special, however try going at night.
The Forest temple is my favorite thematically. The theme and level design mesh well; it feels like a rich chateau that's haunted by centuries of overgrowth. It's also when the 3D puzzles start ramping up, as you noticed. Also yes, Saria, ouch! That hit hard too my first playthrough. A big theme of this game is rescuing everybody you met in childhood one temple at a time, and Kokiri forest leans hard into this in the beginning. I mentioned earlier about the cinematic, and I think of Saria's scene in particular. It elevates Ocarina of Time above it's predecessors and why the game leaves a lasting mark on the series since. You are saving the world, but that doesn't mean everything goes back to the way it was.
I'm on my own slow playthrough myself in the background of other games. I'm finishing up the last temple before Ganon, so only a few temples ahead of you now. At my pace you'll catch up by the time I pick it back up again.
It's the other thing in the Water Temple that scares me :scared: I recommend filling all your bottles with Fairies... 
:doggirl-shock:
To this day it's the trickiest part of the game for me no matter how many times I replay it. It is a very cool room though.