Question about Solo Harp #1, Ex. 1.10

I've just started working on Solo Harp #1. I got to example 1.10 (the James Cotton lick), and have a question. I've been tongue blocking on the entire harp. When I get down to the 1st hole, I tongue switch (switch my tongue to the right side of my mouth to hit the 1 hole). It seems a little hard to hit the 1st hole (tongue switched) and then hit the 2nd hole right away. I was wondering how you go about doing this? Hope my question makes sense! Also, are you sliding for the 2+ 3+ 2+ like Ex. 1.5?
Thanks,
-Ryan