I'd argue you don't necessarily need to take a course to learn about the segment you want to enter. Search for experts in the field and see if they've published books. Joining an online community in that field may also be a great way to start for additional ideas. If you already have a plan, trying to compare your challenge with what experts have overcome in the past (based on their book/published experiences) would be a great way to potentially speak with them over video conferencing. If going this route, I'd try to tailor it to the person and show your passion in order to hopefully receive a response.
Report Todd's answer
I agree with Todd. No courses necessarily other than general business studies which are accessible for free. Business acumen will come with experience - there are no shortcuts. Take it one step at a time. List relevant questions and assumptions. Find answers to the questions and test the assumptions using the cheapest methods. Repeat the process.
Report Ankur's answer
thank you for your advise much appreciated. however there seems not to be many mentors for the gas manufacturing industry
Report isabella's answer
Gas manufacturing is a very specialized product for starting up and then continuing. Usually high in equipment and process costs, and is generally heavily regulated. Expertise in the form of knowledge and experience is not a highly available commodity.