I haven't personally RP'd too much for the process of creating potions daily, but the experiences I had when I learned the skills (both potion and alchemy) were really great, so perhaps those stories can give some insight!
Kirsten R. (playing the MWE Kat, the toymaker!) taught me the create potion skill IG. She made it into a really awesome RP moment- We went out into a field and collected different types of plants, then inspected different parts of specific plants, then just sort of blended some things together and pantomimed shaking/stirring the potion into the empty vials.
Heidi (playing guildmistress Zat) taught me alchemy, and made it a totally hands-on RP experience. She actually knew some specific plants and ingredients to make some sort of herbal medicinal mixture to soothe bee stings. It was actually a pretty process, actually, but it was in the healer's guild, and she used a bowl and one of those heavy mixing tools, then put the actual result into a glass jar for me.
I love realistic moments like these
Y'know, I probably should spend some time each game "gathering ingredients" and "mixing potions" into the vials, if I claim to be creating potions at each gather!