>>5032
>I don't want to feel like I'm blindly investing time into something vague that has no way to be measured.
This is way ahead of time, but once you get into spellcasting using rituals, sigils or energy projection, it's fairly easy to see if it had the outcome you aimed for or not. With this it's more a matter of learning how your specific skill works. I know from experience the average activation times of different types of spells, ranging from 2 weeks to several years. Some people are going to get faster effects, people are different. Changing the room temperature is not something I would attempt, it's not within my range of skill at all. (Which is why I am not doing exercises like that)