Just keep in mind (and I may have said it before, but it's worth repeating) that learning any song 100% is really difficult because the leads are usually VERY complex and written/played by exceptionally talented and/or gifted musicians.
If "everyone" could play leads like Van Halen, wouldn't they all be doing it already?
You may or may not know and it's maybe worth repeating LOL but I help people restore their nostalgic cars like what we're here on the forum for and I'm constantly telling them if it was easy everybody would have one...
LOL you stole my favorite line LOL...