TL;DR, since chronologically speaking Mistborn Era 2 goes after the first 5 books of the STA, is there any spoiler in Mistborn Era 2 as to what happens in the first 5 books of the STA?
So, a quick intro.
I read TWoK of the STA without knowing anything about the cosmere. I got hooked, but I couldn't find the second one in my local libraries (in Chile so in Spanish). Fastforward, I've been living in the UK for a few years and so I remember this book. I read it again, as well as WoR, and after that I figured out the cosmere. By then I was hooked on the STA so I read Edgedancer and OB.
Then, waiting for RoW, I read Warbreaker, The Mistborn original trilogy, and Elantris, alongside with the Arcanum stories associated to those (Emperor's Soul, The Hope of Elantris and The Eleventh Metal).
I'm always low on cash so most of the books I get second hand. Since RoW is too new for that, I thought I would now go for Mistborn Era 2, but then I found out that, chronologically, Mistborn Era 2 goes after the first 5 parts of the STA.
Now, as I said, I read the 3 first books of the STA before Elantris or the Original Mistborn, and although they go chronologically later, I didn't feel like I was spoiled in any way. Like there was no info on the Mistborn Era 1 on the books of the STA that I read. Is that the case for the rest? Is there any sort of cross-series spoiler on Mistborn Era 2? I imagine no, but there is no harm in asking.
Also, the Arcanum Unbounded says that "Mistborn: Secret History" has minor spoilers for Bands of Mourning. How minor are they? WillI affect my experience of Bands of Mourning if I read Secret history before?
Thanks! and sorry for so much writing.