A few observations here..
On form:
Namecalling has never helped anybody, but the person calling the names -making them feel like important and strong- so can we just leave that out of discussions here?
Could you please update in threads earlier started? That we other people can see whhere you started and what has changed
Don't confuse form over content. Even though someone may seem like the backside of a donkey, the advice given might be relevant.
Secondly, on content.
You are not growing a bonsai, you are growing a plant at this stage. So whether or not this pot was created for bonsai is a bit void. My biggest bonsai pot is 60cm diameter. Does that mean that a 2cm seedling will feel well in there?
Watering is dificult. Junipers do not need a lot of space to grow. They do however tend to get problems if substrate stays wet for too long. This is the reason why a pot on the small side of large is often better than an overly large pot. Also, the substrate used should accomodate a good aeration & water drainage. The soil you have used now looks compost based, which will create some airless wet mess in the pot, if not managed properly.
Note that advice is also climate dependent. As we do not have our geograpic locations clearly visible: Auk and I live in Northern Europe, both in fairly wet areas with relativly cold winters. Clicio lives in the tropics, Brazil. So when judging who can compare your growing conditions best, keep that in mind. Not sure where you are located?