If you're so worried about SBMM, you have likely been having it easy
So many people seem scared of SBMM especially when it comes to playing killer, which would mean you often had those chill and easy games (lucky you) but I for one 9/10games versed challenging survivors, while I'm not talking about top 1% but I hardly ever versed survivors that wouldn't do gens or lacked the understanding of tiles etc.
While I'm not mad about it, this is a huge reason I'm not worried about SBMM, I have versed strong survivors and its prepared me. Often iv versed a great team as my weakest killers (wont happen anymore till I get better at them/they get buffed)
So if you're worried about SBMM, then you was likely lucky before so bare in mind it will take you some more adjusting. Please try keep a positive mind to it, its something for the better. It will normalize games and allow for more accurate stats to be used for buffs to perks, killers etc.
Remember, play how you have fun playing. The game will just put you where you belong, if you are trying your best to win you will verse others doing so. NO game should be a free win or an easy one.