I am new to speed cubing and would like to figure out how to get faster at cubing based on my personal stats.
Which aspect should I focus on? Which principles would be the most useful for me (lookahead or any other concept)? And, any fingertricks I should know for faster rotation (especially for M/M')?
Target speed: sub-25 to sub-35
Current record: 51 sec
Current average: 1 min 05 sec
Turns per second: 2.2
Cube: Original Rubik's brand
Method: F2L + Beginners method for Yellow and Final
Time breakdown: 5-8 seconds for cross; 30-40 second for F2L; 10-15 seconds for yellow orientation; and 10-15 for finishing the last layer.
EDIT: Thanks for all the responses, everyone! I got a MF3RS2 and Cubicle Weight 5 for Christmas, and it's better than I hoped for. I learned full 4LLL plus a bunch of extra algs (Y, Ja/b, T/P/C-shapes) and worked on TPS to get my average down to sub-40 with a record of 28. I also found J-Perm's Cross + F2L videos incredibly helpful, and I'm trying to get that stage to sub-15.
Can't wait for my first comp in February (Bremium Cubing 2019); looking to be sub-30 by then.