I still have sn63 (lead) solder for sale.
As far as soldering goes. Make sure to use a good flux to improve solder flow. Heat is the most important thing. Keep the joint hot while the solder flows. That is both the wire and what you are soldering to. I am sure there must be soldering examples on YouTube. Make the solder flow around the joint before removing the heat. The solder will cool to solid in a few seconds (but will still be hot). It's hard to explain good soldering, but practise helps.
Always make sure you clean any flux off the joint after using ipa (alcohol) and have a nice clean tidy joint.
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