D3rutat

Yes should should put the 2 in a training pot but make sure that the pot is pretty big, bcos since they are in an early development age, their roots are not that strong and one of the 2 trees might overcome the other and kill it. But as long as you DON'T put them in a bonsai pot they should be fine.

After repotting them in the same pot you have 2 options:

1: You can go for a connected root style ( i think it's called Ne Tsunagari) which will eventually form by itself when the big pot gets crowded with roots and they will eventually join together

2:you can join the 2 trunks. I used duck tape to join 2 trunks from my ficus retusa and i got results in about a year. but make sure that they are firmly held together or they won't fuse.

Exposing roots: You can do that even now, but i don't think you will see a nice nebari. Leave it for a few years, check the roots when repotting and when they are thick enough you can start exposing them

good luck

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Bonsai Club Romania