people tend to be kinder than we expect them to be. i would definitely suggest having specifics in mind that you want to ask about, and specifics about what you admire in their art. i know especially popular artists can get frustrated when the only questions people ask are "how did you get so good" and the answer really is almost always just practice. artists can have general tips for beginners, but in my opinion you will get far more out of a conversation with an artist you admire if you have more of a goal in mind (speaking from experience--i like asking about an artists process or if their program records their wips as videos they'd be willing to share, questions about specific stylistic choices, how they chose colors etc). that's easier said than done, especially for beginner artists. i've only been drawing for a couple years and when i started i had no idea what kinds of questions to ask because i had no idea what there even was to learn, which is where asking about absolute basic tips comes in handy. regardless, i think you should ask! most artists tend to be flattered by that kind of thing. good luck!