Whats a good resource for lazy people

yesterday i started learning Risc V and i have learnt many things, is there a good resource which i can trust for looking and understanding each instruction , like the difference between lui and addi, when to extend the sign or not . There are many nitti gritties, I know the best thing is to read the manual but thats just tooo long. Guys is there any other resource or website or youtube playlist,or reading the manual is the only solution. Some context, i will be using riscv for my final year project, so i really have to be good at this