Alright, everything is ordered.
100x 330 Ohm (only € 1,80)
100x 120 Ohm (only € 1,80)
2x BAT41 diode (in case I mess up one, or one is DOA, or something like that)
Weller 20 Watt small soldering-iron (my current one is a bit huge in my oppinion)
FLUITIN 0,7 mm with flux-core
A soldering-iron holder (my current one is a bit cheap)
That should do it i guess. We'll see!
Thx for helping everyone! I'l keep you posted!