Replacing a soldered shut-off valve with a compression valve, concerns about leftover solder

Hi everyone,

I have a leaky shut-off valve under my kitchen sink. It’s soldered in place, and while I have soldering tools, I don’t feel confident installing a new valve this way. My worry is that a soldered joint might leak.

I’m considering replacing it with a compression valve instead. The problem is the pipe is too short to just cut off the old valve. I feel confident desoldering the old valve with a torch, but I’m concerned that leftover solder could interfere with the ferrule on a compression valve and cause a leak.

My questions:

1. If I carefully desolder the old valve, can I safely install a compression valve afterward, or is leftover solder likely to prevent a proper seal?
2. Would a push-fit valve (e.g., SharkBite) be a safer choice here?
3. Any tips to make this process easier and ensure a leak-free connection?

Thanks in advance for any advice!