By now it should be obvious that both crimped and soldered connections have good and bad points. I have been soldering since I was 18 and in the army. Personally I don’t use a solder gun but a pencil type. Guns used improperly create too much heat which is bad. As far as crimping always use the type that has a ‘tooth’ to bite into the connector. Always put the tooth opposite the connector seam. The best connection for wire has two components, electo-mechanical. When possible I crimp a connector like the “Staycons” we see so often. Then I tin and heat with the pencil in a selected area and watch the solder ‘flow’ into the barrel of the connector. I would think you could learn some tricks from Utube.
