Hi there. I'm a bit of a beginner having only dabbled so far in wire work for pendants and earrings but I'd really like to get into some basic soldering and look at making a simple ring for my girlfriend for Christmas. An example of my first ever pieces can be seen in the following image:

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I am considering the following three cooksongold items:

https://www.cooksongold.com/product_...ix=S232&item=1
https://www.cooksongold.com/product_...ix=S233&item=2
https://www.cooksongold.com/product_...ix=APMH&item=3

Am I right that the shank and setting should go well together (as they appear to be part of a "set") and that I should be able to relatively simply solder one to the other before push-setting the stone?
I do not have any idea whatsoever about the size that the ring needs to be either, so am I also right that I should be able to cut a small section of the silver out of the shank and re-solder it together smaller if I need to make the ring smaller?

I don't have much in the way of equipment so far so I will also be looking to get some entry-level gear and have so far assembled the following list. Can anyone tell me if I'm missing anything important or if any of the items I've listed are inappropriate for this kind of project? I don't mind swapping for something more useful but I don't really want to invest much more cash at this point because I don't know how much I'll be doing (life, work, new baby, etc, etc!).

https://www.cooksongold.com/product_...ix=096Q&item=4
https://www.cooksongold.com/product_...fix=958&item=5
https://www.cooksongold.com/product_...fix=DDA&item=6
https://www.cooksongold.com/product_...ix=3117&item=7
https://www.cooksongold.com/product_...ix=3601&item=8
https://www.cooksongold.com/product_...fix=004&item=9

Any tips or thoughts gratefully received! Thank you for reading