The only way to do that in Premiere is to set Track targets in the Timeline panel. There are some keyboard shorts that can be assigned for this. and track presets ... somewhat.
But it's not a 'strong' area for Premiere for sure.
In PCs, you can open a text editor like Windows Notepad, make a text, and drag that from the Explorer window into a bin to get a "notepad" function sorta within Premiere. Not ... optimal ... but the best thing you can do without plugins.
Check the Knights of the Editing Table site, as a couple of their plugins offer massive help for tracking things. And of course, aescripts.com also. There's options there for some of this.
Not sure if this was resolved but the copy to clipboard function does exist in Premiere to an extent. When you mark in and out, make sure you have no clips selected in the timeline, this will ensure what you marked will be the selection that a subsequence will be created from. Once you do this, the subseqence is then automatically loaded into the source monitor, from there you can open source in timeline. There you can insert/overwrite between your edit and source timeline.