I hear you. The thing I found troubling was they would name a part but there often lacked a photo or drawing with that exact object clearly identified with that name. The Langmuir support staff is very prompt with inquires as you go along. Just be patient and keep your cool and they will stick with you.
I am with you on the 2D parts. Lots of people are doing signs and art but I had two things in mind: house numbers (for my house) and making support brackets. Once you get the drawing, then the CAM operation to generate the G-code, FireControl is really the easy part.
I thought I was reading the directions carefully and checking it three times and still plugged the module into the control panel 180 degrees wrong. Guess what: the computer would not communicate with the table. This is after 4 days of building, finding the correct additive for the water pan and designing a part (House numbers) and getting the metal on the table. That took another day of checking and exchanged of emails. They were very patient with me.
I did not know how to interact with this forum. So…I kind of avoided it. You have already meet two really good guys on this site: @72Pony and @Knick. Everyone went through what you are going through and that is why we are all, pretty much, here to help each other.
You will probably meet TinWhisperer in the very near future on this site or his YouTube channel. You could not get better information on how to use Fusion 360. If you go through the Langmuir help videos on Fusion, it will really help. CAD/CAM with Fusion360 | Langmuir Systems. The more repetition and exposure to how the program works and different features that you will pick up from various individuals really helps.
Not that you would have the same response but my first YouTube Fusion 360 videos were by MTD Racing. He does some things, a bit fast, but it shows you what is possible with some of his actual projects. He makes it seem easy. Then I watched a few of Mike Festiva YouTube videos and he takes you step by step. Another who I really enjoy for short topics is Lars Christensen.
And post a question about the specific issues you are having: Make a new topic. Most of the top responders/leaders will look to see if you have read previous threads on this site related to the very issue you are having. It is good to read some of their responses to others who had similar problems.
When you start reading this forum, there is usually someone every week asking some of the same questions that had already been thoroughly discussed with another member. An example is: What is a good CAD or CAM program? That question may not get much activity because many of us have shared what we know more than 5 times at this point.
I am glad to hear that you are going to try to get familiar with Fusion 360. It will get you started with a good platform. And then it has CAM with it. Plus, it is free if you are a hobby user. If you were going to do lots of art, you would really be thinking of SheetCAM for the CAM operation.
Good luck to you and look forward to some exciting and rewarding times with your new endeavor. Again, Welcome.