I'm a trained architect and has been in this field for over 20 years. I don't practice as much as I used to nowadays, but even with my exposure, I still miss a thing or two, especially when involving accessing roof areas.

My suggestion is to pay professionals to do it for you because:

1. They have better visual vocabulary in detecting problems
2. They have experience in comparing issues between hundreds of buildings
3. They tend to know the standard practice in Msia, so they know where most builders cut costs.
4. Not only they're able to detect existing problems, they can also detect potential problems in the future.
5. They're willing to access places (in the building) that you can't.
6. They have the time to do it.

There are degrees and diplomas for it. You can take architectural/building science or technologies, building construction or surveying courses.

Almost all unis offering built environment courses would offer them.

Apply through UPU for IPTAs, or apply directly at IPTSs.

I'm not aware of any short-courses that you can do online for building inspectors.