Not in dim light, you can't, unless you have the Skulker feat. The 5E Stealth rules require you to be unseen in order to use Stealth. Light obscurement (dim light) does not qualify.Haven't seen it in play yet, but it doesn't look very good. If you already have dim lighting or darkness just use stealth and hide. The big benefit of invisibility is the ability to hide in situations you normally could not, but here you already can.
Not in dim light, you can't, unless you have the Skulker feat. The 5E Stealth rules require you to be unseen in order to use Stealth. Light obscurement (dim light) does not qualify.
Hiding and making a Stealth roll are not equivalent. In other words, not every Stealth check is an attempt to Hide. You can make a Stealth check to be silent without needing to spend an action.Interestingly any action breaks the invisibility, so by a strict reading of the rules taking the hide action itself would end your invisibility, but that seems silly so I would allow an automatic hide action when you activate "one with shadows" so that one action turns you invisible and lets you make a stealth roll.
Hiding and making a Stealth roll are not equivalent. In other words, not every Stealth check is an attempt to Hide. You can make a Stealth check to be silent without needing to spend an action.
The Hide action only applies when you are trying to get out of sight, which in this case is already covered.
Interestingly any action breaks the invisibility, so by a strict reading of the rules taking the hide action itself would end your invisibility, but that seems silly so I would allow an automatic hide action when you activate "one with shadows" so that one action turns you invisible and lets you make a stealth roll.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.