Happy to share info. ;) Once it starts leafing out vigorously again, whichever twigs/stems that don't produce any foliage are dead. Trim each one where it branches away from the main or secondary branch, leaving as small of a stump as possible without cutting into the stem or branch to which the dead twig is connected. You can always cut more but can't replace anything once cut, so if you're not sure, start by making little cuts until there's nothing left but live branches. The plant could probably care less if you do this or not, it's for the visual appreciation of people. If you don't want to do it, that's fine too.
Repotting is easier with a helper. One person would hold the plant upside down, with open hands on either side of the main trunk while the other person pulls the pot up and off of the root ball. From there, it's a matter of addressing what you find. Woody entities can, over time, make a 'pancake' of roots at the bottom of the pot. If you find that, it can be chopped off by laying the plant sideways and chopping it off with a shovel, pruners, saw. Once you get that off, the old soil should crumble away. It looks like it would probably fit back in the same pot after that, but impossible to say w/o seeing the roots & the size of them after some trimming & old soil removal.
Whatever pot it goes into, fill around the roots, so the trunk is emerging from the same point as it did before, but don't pack tightly. Tiny air pockets throughout the pot are good, and helpful for avoiding rotting roots. Try to sprinkle gently the first few times you water so the soil doesn't compact from the force of gushing water. A gentle rain is awesome, if the timing works.
