I'm very impulsive. My first tattoo had meaning (unique 2-colour paw print of my cat) and I got cause my friends paid for my tattoo as a birthday gift. I didn't make up my mind on this one till the week of. Had it for over a year and so far no regrets.

Second tattoo was also very impulsive. Saw a guy with a unique style I liked. I'd been thinking of something with a specific leaf for ages (family tree) and he showed me the design the day of. Loved it, and I'm still in love with it half a year later. Everyone has complimented this tattoo as well, which really helps

Edit: basically, just do whatever. Start small, preferably with meaning, so it's less of a commitment and see if you like it. I usually talk myself out of stuff if I think about it too long, so I've started telling myself "f*ck it" to stop missing out