Hey there! Don't feel ashamed!!! Indeed this solo has some tricky parts! Sometimes our difficulty meter doesn't quite hit the mark, as I would place the solo at least 3 (or even 4) out of 5.
So yes, even though the rhythm is straight forward strumming that's suitable for beginner to intermediate, the solo is definitely a bit more advanced.
Learn and practice the solo one phrase (or lick) at a time. When you encounter some of the trickier licks, it's important to slow way down and practice the licks very slowly at first. Practice them over and over, programming your fingers and burning away any resistance in your muscles. Over time, you should be able to play these licks faster and faster.
Hope this helps, good luck!
Mike
Keep rockin!
Mike Olekshy
GT Guitar Coach