Most adult friendships are with people of similar age. Friends 10-20 years older provide perspective on stages you're approaching, modelling of how to navigate them, and a different lens than peer-only relationships.
Where to find them
Work (senior colleagues you connect with naturally). Hobby groups (book clubs, classes — often skew older). Neighbourhood. Activities like hiking, gardening, volunteering. Most older women welcome younger friends and find the relationships restorative.
Aim for 1-2 friendships with women 10-20 years older. The investment pays back over decades as you face the stages they've navigated.