How do you secure gold jump rings? And is a pencil torch a good choice to solder silver jump rings?

I’m a complete beginner to jewellery making. I started off by repairing family’s jewellery and adjusting sizes. That led me to making my own jewellery for fun and because I found it hard to find jewellery I wanted. I want to start selling jewellery and bought sterling silver and gold-filled chains and other parts. Which I now know might’ve been a mistake, stainless steel jump rings might be more durable.

I have to work with what I have for now. I want to solder my jump rings for a more polished look and durability. I don’t want to sell anything that can come apart easily. Based on what I’ve read, carefully soldering the silver jump rings with a pencil torch and jewellery solder might be the way to go. But I can’t do that with the gold-filled jump rings. My goal is to upgrade my tools and skills as I go but I won’t be able to get a pulse arc welder just yet. How can I secure the jump rings for the gold jewellery? And what kind of pencil torch do you suggest?