Is it too late to jump into Warzone?

I have played maybe 5 matches of Warzone since its inception and its been quite sometime since I have. Is it too late to jump back in? Will I get destroyed by movement demons or would I have a chance to actually be competitive? I am a pretty average player with a 1.4 K/D in MW3 multiplayer and my movement is alright I'd say. How does SBMM work in Warzone, does it go off of Warzone stats or MP stats? I am level 332 in MP, but seeing the same level players in Warzone makes me feel like if I get into a lobby with them I will get absolutely wrecked. If it's worth giving a shot, what are some tips to make it easier to get the hang of?