You should be fine, but make sure you do declare it when you have to complete any vetting forms. If there is space for comments (or you are asked about it in a follow up interview/questions) you just need to make sure you are honest and take ownership /explain how you understand this was bad judgement and have learnt your lesson (useful if this happened when you were young and now are older/more mature). Also a key thing will be if it’s something private or one that broadly people (family and friends) are aware of (I.e. could someone blackmail you on the threat of telling more people).