I want a new lens, but idk nothing! :/ Help

You did the right thing getting the 16mm.  With the Ultra Wide Angle Adapter (VCL-ECU1), I think you'll get what you're looking for.  In my opinion, the kit lens and the 16 with Ultra Wide Angle Adapter should cover most of your needs and make you very happy at a low cost, unless of course you are working in low light.

As others have said, the 35 and 50 are really great for low light.  The SEL35F18 has been on my camera about 75% of the time since I got it.  The 50 is nice, but a bit too long for working indoors.

If you get the 35, you will probably be fine giving up the kit lens if you also have the 16 and UWA.  But, honestly, the kit lens is a nice lens too.  And as for the 55-210, I have it and it's great for longer distances, but I think you might find that you don't actually need such length most of the time.  On the other hand, it is a really good value for the quality it gives.

Anyway, my main advice is what the others have said, get the UWA for the 16mm, and get the 35mm.  Try shooting with just those two lenses and see how it goes.  Then if you feel you're missing something, go from there (if you have those two lenses and do feel you are missing something, it will probably be long range, which means outdoors, which means low light is less of an issue, so the 55-210 will probably make you happy at a reasonable price).

It's also worth mentioning that the 55-210 makes a nice macro lens with a close-up lens on the front (like the Canon 500D or a Raynox).