Soldering is an art. With practice, one can learn to easily assemble complex circuits. When you make mistakes you need to do rework, which is usually quite time consuming with through-hole parts. The solder must be completely removed pin-by-pin and the vias cleared of solder before a new part can be installed.
The ‘slap method’ for through-hole rework article describes a trick called “slap method” for removing solder without a solder vacuum. This is one of the tricks that can help with the headache of through-hole rework. This can help you a lot. Here is a video that shows how ‘slap method’ works.
Be warned that this method is not for soldering beginners and is dangerous if done improperly.