LeoMakes is a Youtube channel with the DIY synth maker in mind. His latest two videos cover the art of soldering. Specifically with Eurorack modules in mind and also working with surface mount.
Surface mount uses extremely small components and might be pretty challenging if you've never tackled it before, but Leo talks you through it.
In this video Leo shows a few ways to make soldering a Eurorack DIY kit easier. Top tips Leo.
Worth a sub.