DarkplasmaMy first question
What are the STAR types that are ( OK ) to draw FUEL from with out over heating ?
Others have provided the star classes in an easy-to-remember acronym. It's true that, of those stars, different classes will overheat your ship quicker than others. The further away from the orbital threshold, the slower your scoop will work, but there's a bit of a sweet spot of speed you can whip around (regardless of your orbital distance) to reach the top scoop rate your particular scoop can absorb. Once you reach that top rate at a safe temperature distance, drop your throttle to idle. You'll virtually "park" and gulp up fuel with minimum effort.
Once you get the best fuel scoop you can, you'll spend only a few seconds scooping, and be full before you begin to overheat.