You need to plan at least the first 2x2 of FB during inspection. Use more inspection if needed..
I am not experienced (started december) and not super fast (Ao100 broke 45s, Ao12 like 42s), and I can always plan at least 2x2 - rarely full FB. Cubeast says I am under 9s on the iCarry. Many are faster, but a few outliers makes it look bad. SB is under 15s. SB is one of my weak spots.
Try many slow solves, good inspection, and try to focus on movecount. I get many FB in 8-12 moves. I am sure a block trainer helped me a lot. Just start out with 4-move solutions.
Turn speed will come, I increased my average TPS with about 20% over the last month or so.
And for 4A, Kian has all the cases with algorithms. Just learn them. I still have not learned 6 wrong edges, but just runs M' U2 M' to get it to a case with 1 wrong top+bottom.