Hi Kelly,
Yes perservere. I am kinda new to playing, I played many years ago for maybe 6 months, now I have started playing I am now 42. I joined guitar tricks and even though I know most of the basics in Lisa's course at least the 1st fundamentals, I have picked up many tips I did not know and Lisa has been great.
With the spider exercise, I still have the same issue as well, I find the finger stretching exercises that Lisa mentions work, but what I have found is don't go too fast, slow it right down and look at the fingerboard and try as hard as you can to hit each note deliberately, if you speed up too quick you miss the notes, go slow and keep at it :)