Can I assume you at least used flux when soldering? I always grab a syringe of MG Chemicals from amazon… easy to clean up with isopropyl alcohol after and your solder joints will be easier to make, avoid lead free solder unless you know what you are doing. The lead free type balls up too easy and doesn’t flow to the parts as well.
One thing I’ve learned with components is if you need 50 of something like a resistor you may as well order 1000 of them. For instance I needed 82k and 18k resistors for a voltage regulator recently 1000 of each was $7 total from digikey even. LCSC is even cheaper on components like that also you can get simple components pre assembled from JLCPCB with LCSC parts (note you have to use thier basic tier parts but that’s fine for LEDs).
A rather hilarious mix up on my end was that I ordered some 200ohm resistors for LEDs… and ended up with 402 resistors… they are like grains of sand and basically fit entirely between the pads of a 805 part… so I soldered them to the 805 pads it’s quite funny to look at but they work.