A Google search on
coated electric guitar strings 008 got me started toward sites. I think the combination of coated and 8s is going to be very hard to find, so you might want to choose one or the other.
But that seems also to be a very non-beginner set of requirements. Coated implies that you know your skin chemistry makes strings go dull quickly, which is a very experienced piece of knowledge, as is the fact that you can't bend easily with 9s or 10s and your hand gets tired. A beginner move would be to squeeze too hard, tiring the hand and making all the notes sharp. Knowing that you want to bend and that it tires your hand shows you're at least at novice.
We don't suggest gear here. It's a rule. There are reputable brands and suppliers, and searches like I mentioned above should get you started, but you may need to go either-or, not both.
My go-to advice is to go for medium picks and strings until you can formulate a sentence starting with "I ..." to justify the change. You have that, and as B.B. told Billy Gibbons, "why do you want to work so hard?"
But I can't help thinking it's technique not string gauge that's your problem, but not knowing you, I can't watch and figure out what the fix is.
Anyway, good luck.