Excellent, that was worth 5 pence. (It makes sense that Waltana wouldn't be interested in serving a patron of pond scum; she's not a witch. Dominating the yeast is admirably ambitious, if it can be done in accordance with the laws of Britain and Marra.) Does the chemist sell sulfur and other 'naphtha' ingredients? Does Waltana want to buy anything else?
"My intuition is that a machine to make rubber or polymer will be easiest to sell to the IEC. Or maybe a construction arm, but they have plenty of labor. I'm happy to build my shelter by temporarily hiring more laborers than can live in it, but in the future, for maintenance and expansion, a construction arm might be useful, if my initial permanent population is smaller than in an IEC shelter, and much less expendable. But right now I need money, not machines that will be useful a year from now. The surgery tools sound awesome, but I think we should wait until we talk with a doctor. What do you think of that?" She does not try to reestablish mind-reading.
Time for some lectures on the way to the hardware store.
"As a factual question, you're not stupid. You're a one-in-a-thousand prodigy, or you would be in my world. You're smarter than me; I'm only one-in-a-hundred.
I would prefer that you not worry about what I think of you. We have a week-long contract. Whether I offer you a longer contract is dependent on a lot of things, and your Intelligence is not one of them, unless you get attacked by a rare creature that curses your mind or something. Of course, if you were permanently mine, then even that wouldn't matter - I would be bound by my duties towards you just as permanently.
Anyway, the things I'm looking for that are under your control are mainly your ability to use your spark, which I'm not worried about, and your tolerance of mind-reading. So far I'm impressed with that too. You were correct to immediately pull away when you noticed your thoughts getting twisted. The best method you have to avoid thinking about something is to think about something else. To that end, I can help you practice focusing and aiming your focus. To suppress a thought while thinking flexibly about many things, you can either build a lasting habit of turning away from a particular topic, or you can restructure all the rest of your thoughts to follow a pattern which you can focus on as a single target, which is easier to adapt as the set of topics you want to avoid changes, but much more work to set up at the beginning.
Regarding being a 'real' engineer: as a factual question, it's normal in my world for some people to learn things slowly and some people to grasp them intuitively." Wizards and sorcerers are the obvious example, but also, sort of, fighters and paladins; and bards vary in how much education they have but end up with the same circles, as do alchemists. Clerics and oracles have a similar division, if you look at many of them on average; not with their spells, but with their spiritual development. "What is a 'real' engineer? Well, that's just a phrase, but an intuitive engineer is certainly good at building machines, which is the point of engineering as far as I know. You'll probably never teach at a school for trained engineers, and likewise a trained engineer is unlikely to teach intuitive engineers how to use their spark. However, the two kinds of engineers can probably collaborate profitably, and I want to hire a trained engineer to work with you at some point.
You might be able to become a trained engineer yourself - I don't know the qualifications but they mostly use their Intelligence to work, right? - but I don't recommend that unless you expect to be very isolated.
When you think of a 'real' engineer, though, I don't think you just mean a typical example of that concept. I think you're worrying about whether other people will approve of you. The usual ways to fix this in mortals is to give you structure and wait years until you trust that structure and feel safe letting go of worrying about other people's opinion, or by using emotional manipulation magic. Other Evil groups - not followers of Marra - also use overwhelming fear, or giving you power until you stop caring what your subordinates think, but that doesn't actually fix the mortal tendency to assign a value to every person and compare yourself to them, just suppresses or appeases it.
I'm willing to use emotional manipulation magic on you, if you consent, and if I'm sure that your spark is your own ability, or if it's a divine gift but I'm sure emotional manipulation won't damage your relationship with the god who gave it to you."