Misc. Questions

[Gorthaur the Cruel]

#1 Why do I think Beren to be a dummy? If he wanted all three of the Silmarils, he should've just taken the iron crown of Morgoth & back to Menegroth.

#2 the Silmaril says that after Finrod was slain, he was able to walk with Finarfin, his father again. Does this mean his soul was rehoused like Glorfindel?

#3 Did the house of Fingolfin & Finarfin (except Galadriel) swore the oath of Feanor?

#4 The passage below gives me the impression that the children of Finarfin were skilled in magic & enchantment.

By the arts of Felegund their own forms & faces were changed into the likeness of Orcs;

The Silmarillion - Of Beren & Luthien

#5 If Huan had lived during the time of Sauron, would he be able to win against him with his ring on?

This was exactly what Luthien did when she disguised Beren & Huan. So did the children of Finarfin come near in magic?