Understand that you are choosing a platform, not a skill
Learning a visual builder means learning that builder. The logic you develop transfers loosely; the work you produce does not transfer at all. That is a reasonable trade for speed, and it is worth making deliberately rather than discovering later. Before a long course, look at what happens to an application if you ever want to leave.
Ask what you can take with you
Platforms differ enormously in portability. Some let you export data cleanly, some export data but not logic, and some hold everything. Automation tools sit on connectors to other services that can change or be withdrawn by either side. None of this is a reason to avoid no-code; it is a reason to know the answer before you build something the business depends on.
Look at the platform pricing, not the course price
The course is frequently free because the platform is not. Usage-based pricing on runs, records, editors or seats is where the real cost sits, and it usually appears once a project succeeds rather than while you are learning. A free course on a platform whose next tier is substantial is still a purchasing decision.
Find out where the platform stops
Every no-code tool has a boundary: performance at scale, complex data relationships, offline behaviour, custom logic, compliance requirements. Vendor training rarely dwells on it. The most useful thing you can learn early is which problems the platform is bad at, so you do not discover it three months into a build.
Match course length to what you are building
This category ranges from twenty-minute orientations to courses of many hours. A short course is usually enough for a working prototype. Data structure, permissions and security in a no-code app are the parts that take real teaching, and they are the parts a quickstart cannot cover. Where a provider publishes duration we record it.