Oh I know I won't regret it. It's an absolutely incredible series. But it is also undeniable stressful and anger inducing which is worth it in general but possibly not right now given I've got every long working hours till august.
On another note, how is the difficulty compared to DS 3? How many bosses in the main game would compare to Dancer or the Twin Princes in DS3?
First off, it might not apply to you, but:
One of the most stressful part about the soulsborne genre is that people don't 'prepare to die'. You get your shield to hide behind in DS1 before you get a weapon and so your challenge to not die holds you on the edge on the careful side.
One of the things bloodborn does so well is removing that feeling by simply removing the shield.
On DS1 I always used a shield, it was my first game.
On DS2 I went mage because I thought the hit boxes/detection was bs.
On bloodborn I was being more aggressive and more focused on dodging when the blow comes so I could fast get in more hits and win 'better'.
When DS3 came my style from bloodborn had changed the way I approached dark souls. Not to the point where I never used a shield but to the point where I'd much more often dodge and be more aggressive In my playstyle.
When I then turned to Nioh I was having the best time I've had with a game of the type, fighting on the edge offensively as opposed to defensively as I did when I started out on DS1.
My real first of these was Lords of the fallen, but that was really a easy difficulty game compared to the others. Everything was super slow.
As for the bosses:
I'd argue it depends on your style, but the hardest main-game boss in ds3 was Nameless King. He is harder than any base-game bosses from bloodborn.
The twin princes I'd argue are also harder than any main game bosses from bloodborn. But the dlc bosses in bloodborn are (1 aside) all harder than the twin princes.