What is the "proper" way to view all of the startup programs and services?

I know the above question isn't fully complete and lacks some important information, I will (hopefully) provide that below, but first I want to explain where I am coming from with this question a little.

I would consider myself a power user in Windows (maybe even more than that). At one point I was even studying for my Microsoft Certified System Administrator (MCSA 70-270), worked in IT dealing with complex virus removal (anyone remember Combofix and Bleeping Computer?) and generally am comfortable bending anything up to about Windows 10 to my will.

I also have some experience programming in .Net, Java, Python, and Arduino's version of C++ (FWTW).

I have been trying to force myself to use Linux as my primary for a little while now. I ran Mint as my primary OS for a little over a year, and have recently switched to Manjaro to try Wayland and "increase the difficulty level" as it were.

The problem that motivated this post is that I recently installed an application via the AUR by cloning and making the package. Annoyingly though, the application is configured to run at startup and I don't see an obvious setting in the application to turn that behavior off.

I know I can "Google" how to figure out this particular problem, but it seems like a good opportunity for me to metaphorically learn how to fish rather than being given a fish by learning the Linux equivalent of what I would do in Windows for this kind of thing.

If I had this issue in Windows I would approach the issue in the following manner:

1. Depending on flavor of Windows do one of the following and check the autostart tab
   • Run MSConfig
   • Run Task Manager
2. Check the Startup folder for my User and All Users
3. Pull out the "I'm done messing around tools"
   • Hijack This
   • Autoruns
   • WhatsInStartup

I understand, and know the various locations and registry entries the applications from step 3 are looking at, it's just usually faster to use them than go digging into those locations individually.

My question therefore is, what is the Linux equivalent of the methodology I would use when in Windows? Is, or are there, specific tools for looking at startup programs and services? Is it as simple as digging into Systemd? Am I approaching this with the completely wrong mindset?

Essentially, what am I ignorant of, and can I that ignorance be rectified using my existing knowledge as a framing device?

Regardless of anything else, I very much appreciate your taking the time to read all of this and thank you in advance if you do have the time and knowledge to spare answering this question.

Cheers!