How do you make friends? I have no friends other than my SO and it has been that way for many years. Even for online friends I have trouble knowing when to message, what to say, and how often to start conversations. I usually convince myself they don’t like to hear from and stop initiating conversations :(
Stick to your interests - tabletop gaming and d&d groups specifically are an easy way to make friends. Likewise physical activity groups like biking, hiking, or running. Volunteering can be hit or miss depending on your age bracket.
A lot of game shops have open game night where you just show up and play various games with strangers. Great way to practice meeting and talking to people.