Make sure you are currently selecting the comp you wanna export, then go to File > Export > Add to Render que > Render. Render que is usually a fast option both in starting the export and the exporting speed itself!

Premiere Pro is better for Sound designing, video structure editing, video editing in general, and narrating for videos as well as being able to edit a whole lot faster. After effects is better for Animations, Compositing, Visual FX, Motion Design, and smooth high quality results overall. So essentially Premiere Pro is the best for video editing and After Effects is the best for a higher production quality 🙂

The best tip I can give for sound design TIMING, is to zoom into your workspace and line up the start of the sound effect's audio-timing to the frame you want it to start at 😀 (In Premiere you should see the audio wavelength of the sound, in After Effects you double tap L on your keyboard to open the audio wavelength of the specific audio clip). For when to stop a long sound effect, usually its best to have it subtly fade away without bringing in attention to the fact its fading away, it should be seamless and too subtle to notice, that way it only adds to the immersion of the specific moment in the video and not afterwards when the moment has already passed, which would break that immersion. For a short sound effect, its usually good to just let it play through all the way and stop on its own!

@Hoang Nam Le you will, only time will tell 🙏

@Shinichi Ayano Aye I appreciate it 💯