do i need to be aware of some differences when i follow a tutorial made for construct 2?
Pay attention to plugins and behaviors that C3 might not have, but i doubt that.
For sure pay attention to tutorials that are using community plugins that are not supported on C3.
Actually any plugin,behavior, effect that is not made by scirra won't work on C3. Unless the original developer of that plugin,behavior or effect converted it to be compatible with C3.
Other than the above everything else is the same, events are still using Conditions and actions the same way, and the actions and conditions so far they didn't changed, they actually got better a bit in C3. so u might not need to do uid picks for example.