I really don’t know what to do for mine

I’ve had 3 very separate home/school/uni lives and I’m wondering having a party at home will burden ppl from boarding school and uni w the journey? And I haven’t kept in touch w school friends especially well so it’s hard to know who to invite from school? And will a big party be stressful?! And do I even like being centre of attention?!!
Ugh so many questions.
What did yall do for your 21st?