First tattoo and doubt question

As the title says, I’m really thinking about getting my first tattoo I have been thinking about a certain idea for about 3 months so far and I plan to wait at the very least another 3 before I make any decisions.

I’m a very uncertain person - I always think about the worst and overthink everything.

Recently I’ve been in my head whether or not I truly want a tattoo for myself or if it’s more so to fit in (I really don’t want to get a tattoo I regret)

Are there any ways I can know with certainty that it’s for myself, this might be a dumb question as it comes down to how I feel but has anyone else experienced this and if so how should I go about it?

Located in Australia Victoria