It is a tough call to say where the starting point is, many approaches can all lead to good coffee. It either begins with a lot of reading or a lot of roasting, or a lot of reading and roasting but most of all patience. I guess you could not do any of that but for me my goal is coffee better than anybody else’s. You do what you want to do. But considering you bought this thing and don’t want it simply as a counter ornament, reading and trial/error experimenting is par for the course.
I and others have written some thoughts if you search through the forum, there are profiles but no library of profiles for the Home there is for the pro but unless you are familiar with when stuff happens it will be difficult to apply and they are sampling roasting. There are many caveats and prairie dog holes in roasting so I’ll try and keep this relatively brief. There is a library of resources on here as well. I recommend first searching on YouTube for “Mill City” roaster classes. Although for drum roasters it will give you the basics. Maybe after that Scott Rao’s books though I haven’t read his new one.
I basically got an oven thermometer broke it out of its casing and snuggled it at the top of the roasting chamber. Then did a series of flat temp profiles to gauge where the oven probe read in correlation to the app and where and how long at various temps the beans reached first crack and at what temp color they reached. Which enabled me to have a general familiarity where first crack happens and with trial and error, where second crack happens. This helps if things change, which happens often in roasting. I basically profile or adjust profiles by marking at what temp color changes or roast markers occur and adjust from there based on smell. Though highly recommend making sure wherever you are roasting the hot air can be evacuated via a vent or hooking up a vent or hood so the heat/smell can be evacuated as you are roasting.
Lastly never be afraid to take a break, make a cup of tea, and relax. Buy a bag of roasted coffee from a roaster, compare and contrast what you are doing to the world around you. So you can objectively taste your coffee.
And for the love of god post a picture of the profile and not just the link.