I always hot water bath can my tomatoes and have only tried adding lemon juice one year, but have never had any problems.
But I use my sauce for pasta sauce so I cook the snot out of it after opening it anyways.
I got a tomato variety called Old Brooks from Totally Tomatoes that is an older variety and tends towards the acidic side. It’s supposed to be resistant to blossom end rot and early and late blight as well.
Two of the varieties I didn’t check well for size and it turns out they are cherry tomatoes, so I will give those away to friends or garage sale them.
I'm also doing 4 types of cherry tomatoes. Rosella, Barry's, Chadwick and Yellow Pear, all from rareseeds. I like them in salads, eaten whole or sliced in half and salted. Doing 4 in search of a favorite. Whichever one I like best, I'll just do that next year.