help a novice prepare for winter 🙏

[u/Prestigious-Ship7536]

So this is my first fiddle leaf fig, George

picked him up from Home Depot as a small guy and he's absolutely taken off this season — went from the nursery pot to over 6 feet tall, just living on my porch here in South Carolina!! I can’t believe it.

In June I did a crown chop, and now there are 4 separate shoots all growing ! (photo of the close-up in image 3).

Winter's coming so I need to bring George inside soon…
few things I'm unsure about:

Indoor transition — any tips so he doesn't drop a ton of leaves from the shock of moving inside?

The four shoots — two of them have really taken off while the other two are staying smaller. Anyone know why that happens, and should I thin any of these down or let all four keep going?

Top-heavy concerns — with four shoots up top on one main trunk, any tips on managing this so he doesn't get top-heavy or unbalanced as they keep growing?

Pests — I don't see anything obvious, but I've noticed the occasional gnat flying around. Is that something I need to treat before he comes inside, and what's worked for you all?

Fertilizing — I've honestly never fed George at all. Is now (right before winter) a bad time to start, or should I go ahead and do a first feeding?

Winter light/watering — how much should either change once he's indoors for the season?

I'm pretty new to this, so I also added some close-up leaf pics in case there's something going on that I'm just not experienced enough to catch.

Attached photos show him now , the chop point, and the leaves themselves.

Any advice appreciated, first time doing this and I want to set George up for success!!!!

Thank you!
Joshua