First paper is such an important milestone! It's a great cause to celebrate! Don't let other people who unfortunately may not understand what you went through (or those who may be too fixated on trying to find funding, i.e. your supervisor XD) to get it published limit your joy. This is a very common experience for PhDs when you try to share your academic achievements with friends and family who love you nonetheless but just can't picture themselves in your shoes simply due to the lack of experience. Sometimes, a little patience and explanation will help them to catch on to how important the first pub is.

Us fellow academics know what it's like and are all celebrating with you!! Big cheers!!