I'm a sub-25 3x3 cuber. I have been cubing for about 11 months. I use a method called XG that uses beginners first and second layers, but CFOP for cross, OLL and PLL. I have browsed YouTube for many videos on how to improve and they all suggest learning full PLL before anything else. I currently know all PLL's except the Aa, Ab, E, F, Ja, Ra, Rb, V and the G Perms. I would like to know which one of these I should learn first, and what cases will be the most useful in competition. I would also like to know what OLL cases would come in handy. Also, if you could include easy to learn F2L cases, that would greatly benefit my skills. Thank you for taking the time to read my post, please comment what you think. Thank you!