I use these song making websites to get a head start on my music. I make the beats and melodies. Once i finish making the beats and melodies, I export them as ".json" and ".mid" files to 1, save my work, and 2, take it to Soundtrap to finish it all. It's a good start on learning how to do beat patterns and melody patters for starters until you get to a more advanced way of making music.

In my opinion, this is better than Bandlab for many reasons. 1. Barely a wide spread of any instruments, including the 808's. 2.  It's more simplified for new music creators. and 3. It's just overall better. BUT, this is what i use to edit and finish my tracks that i've exported from SynthBox. DO NOT USE ".json" to export into Sountrap, it won't work. Use ".mid".

When I'm done editing and finishing the tracks, I usually just export it to SoundCloud. I, sometimes, will upload my tracks to Youtube and Bandlab but not really frequently.