Agreed. Think of training in 3 or 4 components:
1. Length work
2. Girth work
3. Erection quality support
4. Sensitivity training (to be able to last as long as you want and finish on command)
Maybe there is more, but those are off the top of my head as the main categories.
There is really no need to do more than one modality per session of 1 and 2. So a manual stretch session (which is high tension, short duration) plus a high-tension, short duration extension session is just redundant and probably neutral to negative. Some guys do very light tension all-day stretching (ADS) after a higher tension short length session just to keep things elongated but the jury is out if it is effective or not. And not needed for a newbie.
Same for girth work, especially for newbies. Once you are more conditioned you can decide if you want to stack or ladder some girth modalities, but that is months away from a starting point.
The best approach is to do the least necessary to be effective. The issue as you continue on is, like a lot of other types of physical training, the farther down the road you get in PE, it seems the more stimulus you need to keep the growth coming, or you have to take breaks to de-condition the tissues. At least that is the experience of many.
So for as long as you can, take advantage of the "minimum effective dose" approach. Someday you might miss the days when you were growing well with just 30 minutes of manual stretches.
Categories 3 and 4 are more involved and complicated, but worth attending to with research and some effort, so consider keeping those categories as part of your enhancement regimen if either are an issue. Sometimes PE can change your current EQ and sensitivity, so keep an eye on them even if you’re good for now.