Accent walls are best when used on a wall with no interruptions like doorways or windows.. As for the plan you have I would need to see the whole space but from what I see I would not do the trim you plan. What is your reason for this ? Glad to hear the corner piece is being removed you should have another night table there IMO but what size is that bed ?

Molding on such a small wall with a window will not provide the look I’m sure you are aiming for (will feel broken up instead).

If the bed can’t be moved to an uninterrupted wall, add drapes and art over bed, which will create interest and balance.

Is this the only wall the bed can
go on?
An accent wall on that wall would be a lot of work for very little to be seen.

This looks like quite a cramped space and not well suited to an accent wall at all.

I would remove the corner shelving unit and place art that you like above the bed.