Keeping the throttle in the blue zone is a bad idea. It's good that it seems to be working better than before, but you need to advance from that position because it's a bad habit to get into. You need to fly forwards, backwards, fast and slow, depending on what the NPC does. The main thing, though, is use of the lateral thrusters, which you should practice all the time.
Each time you go to the same RES, there are different spawns of NPCs - sometimes only small ships, sometimes only large, sometimes both, sometimes a lot of ships, sometimes very sparse. if you don't get continuous targets to shoot, log until you get a decent spawn. After you log, a clue to a good spawn is how many square-headed targets immediately resolve on your radar. If there are none, it's probably a slow spawn. If there is one or more, it's probably good. It's not an exact rule. but gives a good clue if you want to save time. The square headed ones are always wanted ships and mainly mission targets.
Your ship isn't fully engineered yet, so don't expect too much. As it is, it would do well in a low RES, but it's a bit limited for a haz RES. Prioritise the thrusters and power distributor, then work on the shields.
I just looked at the video. what you did wasn't too bad. I just noticed two things. firstly, your lasers are engineered for efficient, which means that they do virtually no damage at the range you engaged. You need to be closer than 1km to get the better damage from them - 500m would get the full damage, and by 1500m, they're pretty useless. You therefore need to start and stay closer to your target, and if you struggle with that, change them to long-range. Secondly, leaving your pips at 2-2-2 is a no,no. Your capacitors never moved, so you might be able to go 1.5- 3-1.5 (balanced then 1 up) and leave them like that, which would give you much more agility. Best would be more active adjustment of them, but you need to find your own default position for them. I'd probably go 0-4-2 until I take some incoming fire.
