Organic Chemistry- URGENT

im screwed for organic chem- im not able to memorize preparations of all the compounds. need help for that. i also get confused with structures, but i think i can work on that. is uses important?

how do yall do it?

also im not able to name the compounds, like the first few are okay. but the last ones are tough. i am somewhat familiar with IUPAC naming, but not the trivial names. Trivial names are rlly difiuclt. idk what to do. helpp