You can practice with some discarded electronic components you have at home, such as unused USB hubs. Alternatively, Curry Create has official development projects with accompanying documentation that also includes soldering tutorials.
I'm not familiar with the usdx88s, but based on the physical images, the PCB area seems large, which suggests good heat dissipation. Therefore, the soldering station should have as much power as possible, and the solder wire should also be chosen at a lower temperature.
Furthermore, some components may be difficult to handle with a soldering iron and require soldering paste and a hot air gun. However, the soldering paste has high storage requirements, so do not purchase in large quantities.
The other items include copper wire brushes, which are more effective than wet sponges; and PCB clamps with higher flexibility for fixing and holding. When choosing soldering paste, it is recommended to select one suitable for electronic devices, as others may be corrosive. It is also suggested to use no-rinse or water-washable soldering pastes, which are more convenient. Finally, high-temperature tape is very useful; for example, large components can be temporarily fixed with tape first.
Additionally, avoid buying sets (such as a soldering iron + solder wire + flux/fluxing agent + large sponge package). The items included in these sets are usually of poor quality.
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