Struggling with Words: Is This an Autism Thing?

IS THIS AN AUTISM THING? Okay so… I wanna use certain words in texts and such. However I learn most of those words from hearing other people use them, yeah? So like… my brain doesn’t actually fully know what the word means even if I actually do know what it means. Like I second guess myself. So basically I Google the most random, basic words, all the time to double check if I’m using them correctly. A lot of the time, Google definitions don’t make sense to me either but anyways. And like this is not just slang too. I just googled the word “niche” and still don’t understand what it means and that’s what sprung this up lol. Anyways sorry about the ADHD takeover here but is this an autism thing and does this post make any sense? Long story short, words are hard and don’t make sense… I stick to shorter, less complicated words most of the time