How early before the wedding do you throw a bridal shower/bachelorette party? Please read below

My mom is getting remarried and it’s just going to be a small simple wedding in April, they just got engaged Christmas night. She’s super laid back and “stuff” for lack of a better description. Any traditional bachelorette type stuff is out of the question lol so what she suggested was “fancy coffee and desserts with a few friends”. I’m going to invite more than the four people she thought of, but as I am starting to plan I realized I don’t know when to throw it 😂😂 how far ahead do I do this? It’s more of a bridal shower than bachelorette party anyway

Also, literally one month before her wedding is my baby shower which she is planning 😂 this year is a mess lol