Hi everyone, bonsai newbie here

I got a mini bonsai gift set and used al the seeds at once thinking nothing would sprout but many did! However they were all bunched so I watched a bunch of YouTube videos and bought a bonsai soil mix from a brand called tiny roots.

I know there are probably many things I did wrong but could anyone help me figure out how to make it stop drooping? I attached a before and after (just one day difference)

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You can create a protected environment for a week or two by put transparant plastic over the pot. THis will increase humidity levels, which will assist plants with bad roots.