I never knew I would be reincarnated in a magic world with powers

Hey there I'm soka ichita and I used to live a normal life as an 18 year old high-school student... Until I got hit by a car heading home and I woke up in a random cave as a... Slime I didn't understand at first but I've gotten the hang of it but it still feels weird though I don't know why... But this place is loaded with amazing things I found a few houses underground here and they had some awesome things like loads of books and when I touched them words popped up infront of me saying would you like to learn this skill and I freaked out I soon went back and I touched the book and it popped up again and I presses yes (you have gained forbidden martial art of senkhay) I checked it out and it can transform me into a human and I can now destroy the cave walls it was really cool and then I remembered the other books and thought I've got a lot of reading to do.