You’re fine, it’s practice.

Some of those wires are quite thick which will pull heat away fast making soldering with shitty equipment hard. A good soldering iron* set to the correct temperature will help massively. Flux gets you then last 20% of the way. Most solders are flux cored, but a little pot of rosin flux you either dip the end of a wire in or dab on (i use a sharpened chop stick because no static and cheap) and suddenly the solder flows like water.

Remember not to heat the solder and instead heat the joint. My favoured technique is to “tin” both sides individually and then put then against each other and a quick touch with the iron to make the joint. Ensures you have good contact and doesn’t require growing extra fingers although it is slower.

Hobbiest electronics don’t need perfection, some failure is fine you can always repair it since you made it.

Never be embarressed to learn a new skill!

• don’t worry about crazy expensive name brands tbh, there’s some pretty great stuff coming out of China quite affordably if you’re willing to trawl through reviews. Not the bottom dollar stuff but usually about ~30% cheaper than the Japanese brands or Weller