You can set obsidian to automatically create an attachment subfolder of your current folder upon inserting an image. Alternatively, you can also set a single folder for all attachments.
My workflow is to take a screen cap, then paste it into my note. Obsidian handles the rest, creating an attachment folder if there isn’t one, saving the image in the folder, then pasting the link to it where I pasted it.
Not sure how it could be easier.