I've been looking up on MCUs lately for some projects I have at home. I already have two STM32 Nucleo dev boards that I used with an LPC1768 for school projects. I was looking at the ARM Ecosystem lately to try to find dev boards that would be more suitable for my project since the STM32 are probably way overkill. But now I'm just confused.
There are ARM's Family, Architecture and Core. There is some that don't implement some instruction (I think of the Cortex-M0 for instance). I a little lost in all of this, to be honest.
Looking at the Wiki page doesn't really help to get out of the confusion. I don't think a book would help much since new processors come out every year. Is there any resources, online or whatever form, that can help figure out what should I take, other than just reading through a pile of technical document and user guide?